1. Department of Psychosomatic Medicine and Psychotherapy; University Medical Center Leipzig; Leipzig Germany
2. Department of Obstetrics and Gynecology; University Medical Center Leipzig; Leipzig Germany
3. Department of Visceral-, Transplantation-, Thoracic-, and Vascular Surgery; University Medical Center Leipzig; Leipzig Germany
4. Department of Otolaryngology; University Medical Center Leipzig; Leipzig Germany
5. Department of Radiation-Oncology; University Medical Center Leipzig; Leipzig Germany
6. University Cancer Center; University Medical Center Leipzig; Leipzig Germany
7. Department of Neurosurgery; University Medical Center Leipzig; Leipzig Germany
8. Department of Gastroenterology; University Medical Center Leipzig; Leipzig Germany
9. Department of Hematology and Oncology; University Medical Center Leipzig; Leipzig Germany
10. Department of Orthopedics and Accident Surgery; Helios Clinic Blankenhain; Blankenhain Germany
11. Department of Maxillofacial Surgery; University Medical Center Leipzig; Leipzig Germany
12. Department of Urology; University Medical Center Leipzig; Leipzig Germany
13. Department of Pneumology; University Medical Center Leipzig; Leipzig Germany
14. Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI); University Medical Centre of Johannes Gutenberg University Mainz; Mainz Germany