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Publications

Journal Articles

  • Löffler, A., Beier, F., Bekrater-Bodmann, R., Hausner, L., Desch, S., Silvoni, S., Kleinböhl, D., Löffler, M., Nees, F., Frölich, L. & Flor, H. (2024). Reduced tactile sensitivity is associated with mild cognitive impairment. EBioMedicine, 99, 104896. doi.org/10.1016/j.ebiom.2023.104896

  • Heukamp, N.J., Banaschewski, T., Bokde, A.L.W., Desrivières, S., Grigis, A., Garavan, H., Gowland, P., Heinz, A., Kandić, M., Brühl, R., Martinot, J.-L., Paillère Martinot, M.-L., Artiges, E., Orfanos, D.P., Lemaitre, H., Löffler, M., Poustka, L., Hohmann, S., Millenet, S., Fröhner, J.H., Smolka, M.N., Usai, K., Vaidya, N., Walter, H., Whelan, R., Schumann, G., Flor, H., Nees, F., IMAGEN Consortium. (2024). Adolescents’ Pain-Related Ontogeny Shares a Neural Basis with Adults’ Chronic Pain in Basothalamo-Cortical Organisation. ISCIENCE, 108954. doi.org/10.1016/j.isci.2024.108954.

  • Nees F, Usai K, Kandić M, Zidda F, Heukamp NJ, Moliadze V, Löffler M & Flor H (2023). The association of spouse interactions and emotional learning in interference related to chronic back pain. Neurobiology of Pain, 13, 100122. https://doi.org/10.1016/j.ynpai.2023.100122

  • Löffler M, Schneider P, Schuh-Hofer S, Kamping S, Usai K, Treede R, Nees F & Flor H (2023). Stress-induced hyperalgesia instead of analgesia in patients with chronic musculoskeletal pain. Neurobiology of Pain, 13, 100110. https://doi.org/10.1016/j.ynpai.2022.100110

  • Vulser H, Lemaitre H, Guldner S, Bezivin-Frère P, Löffler M, Sarvasmaa AS, Massicotte-Marquez J, Artiges E, Martinot MP, Filippi I, Miranda R, Stringaris A, Van Noort B, Penttilä J, Grimmer Y, Becker AC, Banaschewski T, Bokde AL, Desrivières S, . . . Nees F (2023). Chronotype, Longitudinal Volumetric Brain Variations Throughout Adolescence, and Depressive Symptom Development. Journal of the American Academy of Child and Adolescent Psychiatry, 62(1), 48–58. https://doi.org/10.1016/j.jaac.2022.06.003

  • Desch S, Schweinhardt P, Seymour B, Flor H & Becker S (2023). Evidence for dopaminergic involvement in endogenous modulation of pain relief. eLife, 12. https://doi.org/10.7554/elife.81436

  • Ader L, Schick A, Löffler M, Löffler A, Beiner E, Eich W, Vock S, Sirazitdinov A, Malone C, Hesser J, Hopp M, Ruckes C, Flor H, Tesarz J, Reininghaus U (2023). Refocusing of Attention on Positive Events Using Monitoring-Based Feedback and Microinterventions for Patients With Chronic Musculoskeletal Pain in the PerPAIN Randomized Controlled Trial: Protocol for a Microrandomized Trial. JMIR Research Protocols, 12(1), e43376. https://doi.org/10.2196/43376
  • Beier F, Löffler M, Nees F, Bekrater-Bodmann R, Silvoni S, Desch S, Löffler A, Hausner L, Frölich L & Flor H (2023). Effects of an app-based sensorimotor training in promoting neuroplasticity and neuropsychological functioning in frailty: a randomized controlled trial. Archives of Gerontology and Geriatrics, 105202. https://doi.org/10.1016/j.archger.2023.105202
  • Gandhi W, de Vos CC, Becker S, Hoge RD, Hoeppli M-E, Schweinhardt P (2022). Neural and behavioral correlates of human pain avoidance in participants with and without episodic migraine. Pain, 163(6): 1023-1034. doi.org/10.1097/j.pain.0000000000002472
  • Diers M, Krumm B, Fuchs X, Bekrater-Bodmann R, Milde C, Trojan J, Foell J, Becker S, Rümenapf G, Flor H (2022). The prevalence and characteristics of phantom limb pain and non-painful phantom phenomena in a nationalwide survey on 3374 unilateral limb amputees. Journal of Pain, 23(3):411-423. doi.org/10.1016/j.jpain.2021.09.003

  • Beier F, Löffler M, Nees F, Hausner L, Frölich L & Flor H (2022). Sensory and motor correlates of frailty: dissociation between frailty phenotype and frailty index. BMC Geriatrics, 22(1). doi.org/10.1186/s12877-022-03416-6

  • Beiner E, Baumeister D, Buhai D, Löffler M, Löffler A, Schick A, Ader L, Eich W, Sirazitdinov A, Malone C, Hopp M, Ruckes C, Hesser J, Reininghaus U, Flor H & Tesarz J (2022). The PerPAIN trial: a pilot randomized controlled trial of personalized treatment allocation for chronic musculoskeletal pain—a protocol. Pilot and Feasibility Studies, 8(1). doi.org/10.1186/s40814-022-01199-6

  • Grouper H, Löffler M, Flor H, Eisenberg E & Pud D (2022). Increased functional connectivity between limbic brain areas in healthy individuals with high versus low sensitivity to cold pain: A resting state fMRI study. PLOS ONE, 17(4), e0267170. doi.org/10.1371/journal.pone.0267170

  • Löffler M, Levine SJ, Usai K, Desch S, Kandić M, Nees F & Flor H (2022). Corticostriatal circuits in the transition to chronic back pain: The predictive role of reward learning. Cell reports medicine, 3(7), 100677. doi.org/10.1016/j.xcrm.2022.100677

  • Fuchs X, Diers M, Trojan J, Kirsch P, Milde C, Bekrater-Bodmann R, Rance M, Foell J, Andoh J, Becker S, Flor H (2021). Phantom limb pain in unilateral arm amputees is associated with increased heat pain and decreased warmth sensitivity in the face. European Journal of Pain, 26(1), 114-132. doi.org/10.1002/ejp.1842
  • Sirucek L, Price RC, Gandhi W, Hoeppli M-E, Fahey E, Qu A, Becker S, Schweinhardt P (2021). Endogenous opioids contribute to the feeling of pain relief in humans. Pain, 162(12), 2821-2831. doi.org/10.1097/j.pain.0000000000002285
  • Becker S, Schakib-Ekbatan K, Wroblewski D, Schweiker M (2021). Perception of repeated pain relief with controllable and uncontrollable pain. European Journal of Pain, 25(8), 1702-1711. doi.org/10.1002/ejp.1775
  • Mouraux A, Bannister K, Becker S, Finn DP, Pickering G, Pogatzki-Zahn E, Graven-Nielsen T (2021). Challenges and opportunities in translational pain research – an opinion paper of the working group on translational pain research of the European Pain Federation (EFIC). European Journal of Pain, 25, 731–756. doi.org/10.1002/ejp.1730

  • Beier F, Löffler M, Nees F, Hausner L, Frölich L & Flor H (2021). Promoting neuroplasticity and neuropsychological functioning in frailty through an app-based sensorimotor training: study protocol for a randomized trial. BMC Geriatrics, 21(1). doi.org/10.1186/s12877-021-02293-9

  • Florin E, Koschmieder KC, Schnitzler A, Becker S (2020). Recovery of impaired endogenous pain modulation by dopaminergic medication in Parkinson’s disease. Movement Disorders, 35(12), 2338-2343. doi.org/10.1002/mds.28241
  • Becker S, Löffler M, Seymour B (2020). Reward enhances pain discrimination in humans. Psychological Science, 31(9), 1191-1199. doi.org/10.1177/0956797620939588
  • Andoh J, Milde C, Diers M, Bekrater-Bodmann R, Trojan J, Fuchs X, Becker S, Desch S, Flor H (2020). Assessment of cortical reorganization and preserved function in phantom limb pain: a methodological perspective. Scientific Reports, 10, 11504. doi.org/10.1038/s41598-020-68206-9
  • Löffler M, Gamroth C, Becker S*, Flor H* (2020). Chronic Pain as a Neglected Core Symptom in Mitochondrial Diseases. Neurology, 94(8), 357-359. doi.org/10.1212/WNL.0000000000009011 *contributed equally
  • Diers M, de Vos CC, Gandhi W, Hoeppli ME, Becker S, Bock E, Baillet S, Schweinhardt P (2020). Induced oscillatory signaling in the beta frequency of top-down pain modulation. PAIN Reports, 5(1), e806. doi.org/10.1097/PR9.0000000000000806
  • Schweiker M, Schakib-Ekbatan K, Fuchs X, Becker S (2020). A seasonal approach to Alliesthesia. Is there a conflict with thermal adaptation? Energy and Buildings, 212, 109745. doi.org/10.1016/j.enbuild.2019.109745
  • Becker S, Fuchs X, Schakib-Ektaban K, Schweiker M (2020). What does it mean “it hurts”? Subgroups holding different conceptions of rating scales evaluate experimental pain differently. European Journal of Pain, 24(39), 625-638. doi.org/10.1002/ejp.1514
  • Schweiker M, André M, Al-Atrash F, Al-Khatri H, Alprianti RR, Alsaad H, Amin R, Ampatzi E,Arsano AY, Montazami Azadehk, Azar E, Bahareh B, Batagarawa A, Becker S, Buonocore C, Cao B, Choi J-H, Chun C, Daanen H, Damiati SA, Daniel L, De Vecchi R, Dhaka S, Domínguez-Amarillo S, Dudkiewicz E, Edappilly LP, Fernández-AgüeraJ, Folkerts M, Frijns A, Gaona G, Garg V, Gauthier S, Ghaffari Jabbari S, Harimi D, Hellwig RT, Huebner GM, Jin Q, Jowkar M, Kim J, King N, Kingma B, Koerniawan MD, Kolarik J, Kumar S, Kwok A, Lamberts R, Laska M, Lee MCJ, Lee Y, Lindermayr V, Mahaki M, Marcel-Okafor U, Marín-Restrepo L, Marquardsen A, Martellotta F, Mathur J, Mino-Rodriguez I, Mou D, Moujalled B, Nakajima M, Ng E, Okafor M, Olweny M, Ouyang W, Papst de Abreu AL, Pérez-Fargallo A, Rajapaksha I, Ramos G, Rashid S, Reinhart CF, Rivera MI, Salmanzadeh M, Schakib-Ekbatan K, Schiavon S, Shooshtarian S, Shukuya M, Soebarto V, Suhendri S, Tahsildoost M, Tartarini F, Teli D, Tewari P, Thapa S, Trebilcock M, Trojan J, Tukur RB, Voelker C, Yam Y, Yang L, Zapata-Lancaster G, Zhai Y, Zhu Y, Zomorodian ZS (2019). Evaluating assumptions of scales for subjective assessment of thermal environments – do laypersons perceive them the way, we researchers believe? Energy and Buildings, 211, 109761. doi.org/10.1016/j.enbuild.2020.109761.
  • Schweiker M, Abdul‐Zahra A, Afonso de André M, Al‐Atrash F, Al‐ Khatri H, Risky Alprianti R, Alsaad H, Amin R, Ampatzi E, Arsano AY, Azadeh M, Azar E, Bahareh B, Batagarawa A, Becker S, Buonocore C, Cao B, Choi J-H, Chun C, Daanen H, Damiati SA, Daniel L, De Vecchi R, Dhaka S, Domínguez‐Amarillo S, Dudkiewicz E, Edappilly LP, Fernández‐Agüera J, Folkerts M, Frijns A, Gaona G, Garg V, Gauthier S, Jabbari SG, Harimi D, Hellwig RT, Huebner GM, Jin Q, Jowkar M, Kania R, Kim J, King N, Boris Kingma B, Koerniawan MD, Kolarik J, Kumar S, Kwok A, Lamberts R, Laska M, Lee MJC, Lee Y, Lindermayr V, Mahaki M, Marcel‐Okafor U, Marín‐Restrepo L, Marquardsen A, Martellotta F, Mathur J, McGill G, Mino‐ Rodriguez I, Mou D, Moujalled B, Nakajima M, Ng E, Okafor M, Olweny M, Ouyang W, Papst de Abreu AL, Pérez‐Fargallo A, Rajapaksha I, Ramos G, Rashid S, Reinhart CF, Rivera MI, Salmanzadeh M, Schakib‐Ekbatan K, Schiavon S, Shooshtarian S, Shukuya M, Soebarto V, Suhendri S, Tahsildoost M, Tartarini F, Teli D, Tewari P, Thapa S, Trebilcock M, Trojan J, Tukur RB, Voelker C, Yam Y, Yang L, Zapata‐Lancaster G, Zhai Y, Zhu Y, Zomorodian Z (2019). The Scales Project, a cross-national dataset on the interpretation of thermal comfort scales. Scientific Data, 6(289), 1-10. doi.org/10.1038/s41597-019-0272-6
  • Wirth B, Riner F, Peterson C, Humphreys BK, Farshad M, Becker S, Schweinhardt P (2019). An observational study on trajectories and outcomes of chronic low back pain patients referred from a spine surgery division for chiropractic treatment. Chiropractic & Manual Therapies, 27(1), 6. doi.org/10.1186/s12998-018-0225-8
  • Becker S, Bräscher A-K, Bannister S, Bensafi M, Calma-Birling D, Chan RCK, Eerola T, Ellingsen D-M, Ferdenzi C, Hanson JL, Joffily M, Lidhar NK, Loren LJ, Martin LJ, Musser ED, Noll-Hussong M, Olino TM, Pintos Lobo R, Wang Y (2019). Pleasure and displeasure as core processes of feelings - the role of hedonics in the Human Affectome: from brain processing to language. Neuroscience & Biobehavioral Reviews, 102, 221-241. doi.org/10.1016/j.neubiorev.2019.05.003

  • Nees F, Löffler M, Usai K & Flor H (2019). Hypothalamic-pituitary-adrenal axis feedback sensitivity in different states of back pain. Psychoneuroendocrinology, 101, 60–66. doi.org/10.1016/j.psyneuen.2018.10.026

  • Nees F, Usai K, Löffler M & Flor H (2019). The evaluation and brain representation of pleasant touch in chronic and subacute back pain. Neurobiology of Pain, 5, 100025. doi.org/10.1016/j.ynpai.2018.10.002

  • Wahl A, Löffler M, Hausner L, Ruttorf M, Nees F & Frölich L (2019). Case report: a giant arachnoid cyst masking Alzheimer’s disease. BMC Psychiatry, 19(1). doi.org/10.1186/s12888-019-2247-8

  • Becker S, Navratilova E, Nees, Van Damme, S (2018). Shared Mechanisms of Chronic Pain and Emotional-Motivational Problems: From Basic Science to the Clinics - EDITORIAL, Special Issue in Pain Research and Management, 2018, Article ID 9305026. doi.org/10.1155/2018/9305026
  • Becker S, Navratilova E, Nees, Van Damme, S (2018). Emotional and motivational pain processing: current state of knowledge and perspectives in translational research. Pain Research and Management, 2018, Article ID 5457870. doi.org/10.1155/2018/5457870
  • Nees F, Becker S (2018). Psychological processes in chronic pain: influences of reward and fear learning as key mechanisms - behavioral evidence, neural circuits, and maladaptive changes. Neuroscience, 387, 72-84. doi.org/10.1016/j.neuroscience.2017.08.051
  • Bräscher AK, Witthöft M, Becker S (2018). The Underestimated Significance of Conditioning in Placebo Hypoalgesia and Nocebo Hyperalgesia. Pain Research and Management, 2018, Article ID 6841985. doi.org/10.1155/2018/6841985
  • Fuchs X, Becker S, Schakib-Ekbatan K, Schweiker.M (2018). Subgroups holding different conceptions of scales rate room temperatures differently. Building and Environment, 128, 236-247. doi.org/10.1016/j.buildenv.2017.11.034
  • Van Damme S, Becker S, Van der Linden (2018). Tired of pain? Toward a better understanding of fatigue in chronic pain. Pain, 159(1), 7-10. doi.org/10.1097/j.pain.0000000000001054 | including: Van Damme S, Van der Linden, Becker S (2018). Reply: Letter to the Editor. Pain, 159(6), 1179-80.

  • Bustan S, González-Roldán AM, Schommer C, Kamping S, Löffler M, Brunner M, Flor H & Anton F (2018). Psychological, cognitive factors and contextual influences in pain and pain-related suffering as revealed by a combined qualitative and quantitative assessment approach. PLOS ONE, 13(7), e0199814. doi.org/10.1371/journal.pone.0199814

  • Grimm O, Löffler M, Kamping S, Hartmann A, Rohleder C, Leweke M & Flor H (2018). Probing the endocannabinoid system in healthy volunteers: Cannabidiol alters fronto-striatal resting-state connectivity. European Neuropsychopharmacology, 28(7), 841–849. doi.org/10.1016/j.euroneuro.2018.04.004

  • Löffler M, Kamping S, Brunner M, Bustan S, Kleinböhl D, Anton F & Flor H (2018). Impact of controllability on pain and suffering. Pain reports, 3(6), e694. doi.org/10.1097/pr9.0000000000000694

  • Bräscher A-K, Kleinböhl D, Hölzl R, Becker S (2017). Differential Classical Conditioning of the Nocebo Effect: Increasing Heat-Pain Perception Without Verbal Suggestions. Frontiers in Psychology, section cognitive science, 8, 2163. doi.org/10.3389/fpsyg.2017.02163
  • Becker S, Gandhi W, Chen Y-J, Schweinhardt P (2017). Subjective utility moderates bidirectional effects of conflicting motivations on pain perception. Scientific Reports, 7(1), 7790. doi.org/10.1038/s41598-017-08454-4
  • Becker S, Gandhi W, Pomares F, Schweinhardt P (2017). Orbitofrontal cortex mediates pain inhibition by monetary reward. Social Affective and Cognitive Neuroscience, 12(4), 651-661. doi.org/10.1093/scan/nsw173
  • Schweiker M, Fuchs X, Becker S, Dovjak M, Shukuya M, Hawighorst M, Kolarik J (2017). Challenging assumptions related to the usage of thermal sensation scales. Building Research & Information, 45(5), 572-589. doi.org/10.1080/09613218.2016.1183185
  • Nees F, Becker S, Millenet S, Banaschewski T, Poustka L, Barker G, Bokde A, Bromberg U, Büchel C, Cattrell A, Conrod PJ, Desrivières S, Frouin V, Gallinat J, Garavan H, Gowland P, Heinz A, Ittermann B, Martinot J-L, Papadopoulos Orfanos D, Paus T, Smolka MN, Walter H, Whelan R, Schumann G, Flor H and the IMAGEN consortium (2017). Brain substrates of reward processing and the μ-opioid receptor: a pathway into pain? Pain, 158(2), 212-219. doi.org/10.1097/j.pain.0000000000000720

     

  • Brunner M, Löffler M, Kamping S, Bustan S, González-Roldán AM, Anton F & Flor H (2017). Assessing Suffering in Experimental Pain Models. Zeitschrift Für Psychologie-journal of Psychology. doi.org/10.1027/2151-2604/a000279

  • Becker S, Diers M (2016). Chronischer Schmerz: Wahrnehmung, Belohnung und neurale Verarbeitung: Aktuelle Ergebnisse und Implikationen für die Behandlung. Der Schmerz, 30, 395-406. doi.org/10.1007/s00482-016-0149-y
  • Bräscher A-K*, Becker S*, Hoeppli M-E, Schweinhardt P (2016). Different brain circuitries mediating controllable and uncontrollable pain. Journal of Neuroscience, 36(18), 5013-5025. doi.org/10.1523/JNEUROSCI.1954-15.2016 *contributed equally
  • Taylor AMW, Becker S, Schweinhardt P, Cahill C (2016). Mesolimbic dopamine signaling in acute and chronic pain: implications for motivation, analgesia, and addiction. Pain, 157(6), 1194-1198. doi.org/10.1097%2Fj.pain.0000000000000494
  • Ewald A*, Becker S*, Heinrich A, Banaschewski T, Bokde T, Buechel C, Bromberg U, Cattrell A, Conrod P, Frouin V, Papadoulos D, Gallinat J, Garavan H, Heinz A, Walter H, Ittermann B, Gowland P, Paus T, Poustka L, Martinot J-L, Smolka MN, Whelan R, Schumann G, Flor H, Nees F and the IMAGEN consortium (2016). The role of the cannabinoid receptor in adolescents’ processing of facial expressions. European Journal of Neuroscience 43(1), 98-105. doi.org/10.1111/ejn.13118 *contributed equally
  • Becker S, Gandhi W, Kwan S, Ahmed A-K, Schweinhardt P (2015). Doubling your pay-off: Winning pain relief engages endogenous pain inhibition. eNeuro, 2(4), e0029-15.2015, 1-11. doi.org/10.1523/eneuro.0029-15.2015

  • Bustan S, González-Roldán AM, Kamping S, Brunner M, Löffler M, Flor H & Anton F (2015). Suffering as an independent component of the experience of pain. European Journal of Pain, 19(7), 1035–1048. doi.org/10.1002/ejp.709

  • Becker S, Ceko M, Louis-Forster M, Elfassy NM, Leyton M, Shir Y, Schweinhardt P (2013). Dopamine and pain sensitivity: neither sulpiride nor acute phenylalanine and tyrosine depletion have effects on thermal pain sensations in healthy volunteers. PLoS ONE, 8(11), e80766. doi.org/10.1371/journal.pone.0080766
  • Becker S, Gandhi W, Elfassy NM, Schweinhardt P (2013). The role of dopamine in the perceptual modulation of nociceptive stimuli by monetary wins and losses. European Journal of Neuroscience, 38(7), 3080-3088. doi.org/10.1111/ejn.12303
  • Gandhi W, Becker S, Schweinhardt P (2013). Pain increases motivational drive to obtain reward, but does not affect associated hedonic responses: A behavioral study in healthy volunteers. European Journal of Pain, 17(7),1093-1103. doi.org/10.1002/j.1532-2149.2012.00281.x
  • Becker S, Gandhi W, Schweinhardt P (2012). Cerebral interactions of pain and reward and their relevance for chronic pain. Neuroscience Letters, 520(2), 182-187. doi.org/10.1016/j.neulet.2012.03.013
  • Becker S, Kleinböhl D, Hölzl R (2012). Awareness is awareness is awareness? Decomposing different aspects of awareness and their role in operant learning of pain sensitivity. Consciousness and Cognition, 23(3), 1073-1084. doi.org/10.1016/j.concog.2012.03.008
  • Bach P, Becker S, Kleinböhl D, Hölzl R (2011). The thermal grill illusion and what is painful about it. Neuroscience Letters, 505(1), 31-35. doi.org/10.1016/j.neulet.2011.09.061
  • Becker S, Schweinhardt P (2011). Dysfunctional neurotransmitter systems implicated in fibromyalgia, their role in central stress circuitry and pharmacological action on these neurotransmitter systems. Pain Research and Treatment, 2012, 741746. doi.org/10.1155/2012/741746
  • Becker S, Kleinböhl D, Baus D, Hölzl R (2011). Operant learning of perceptual sensitization and habituation is impaired in fibromyalgia patients with and without irritable bowel syndrome. Pain, 152, 1408-1417. doi.org/10.1016/j.pain.2011.02.027
  • Becker S, Kleinböhl D, Klossika I, Hölzl R (2008). Operant conditioning of enhanced pain sensitivity by heat-pain titration. Pain, 140, 104-114. doi.org/10.1016/j.pain.2008.07.018

Book Chapters

  • Becker S*, Schweiker M* (2017). Thermischer Komfort und Schmerz: Reflexionen zur Methodik und deren Auswirkungen. In: Schweiker M, Hass J, Novokhatko A, Halbleib R (Editors). Messen und Verstehen in der Wissenschaft – Interdisziplinäre Ansätze, Springer, pp. 187-206. (* contributed equally)
  • Krause MJ, Becker S (2017). Fazit – Messen und Verstehen der Welt durch Wissenschaft In: Schweiker M, Hass J, Novokhatko A, Halbleib R (Editors). Messen und Verstehen in derWissenschaft – Interdisziplinäre Ansätze, Springer, pp. 277-286.
  • Gandhi W, Becker S, Schweinhardt P (2014). The influence of pain on reward processing: current literature and prospects. Neurobiological Studies of Addiction in Chronic Pain States. Contemporary Clinical Neuroscience 17:31-48.
  • Hölzl R, Baus D, Kiessling U, Becker S, Kleinböhl D, Bernhardt A (2010). Prädiktion der Chronifizierung Muskuloskelettaler Schmerzen: sequentielle Diagnostik von Stress und Komorbidität. In: Grieshaber R, Stadeler M, Scholle HC (Eds.), Prävention von arbeitsbedingten Gesundheitsgefahren und Erkrankungen – 16. Erfurter Tage. Jena: Verlag Dr. Bussert & Stadeler.
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