[1] Univ Hosp Tubingen, Inst Occupat & Social Med & Hlth Serv Res, Wilhelmstr 27, D-72074 Tubingen, Germany
[2] Univ Appl Sci & Arts Northwestern Switzerland, FHNW Sch Appl Psychol, Riggenbachstr 16, CH-4600 Olten, Switzerland
[3] Univ Hosp Tubingen, Inst Clin Epidemiol & Appl Biometry, Silcherstr 5, D-72076 Tubingen, Germany
[4] BIH, CRU, Anna Louisa Karsch Str 2, D-10178 Berlin, Germany
[5] Charite Univ Med Berlin, Inst Biometry & Clin Epidemiol, Charitepl 1, D-10117 Berlin, Germany
[6] Univ Hosp Bonn, Inst Patient Safety, Sigmund Freud Str 25, D-53127 Bonn, Germany
[7] Univ Hosp Tuebingen, Inst Occupat & Social Med & Hlth Serv Res, Tubingen, Germany
[8] Univ Hosp Bonn, Inst Patient Safety, Bonn, Germany
[9] Univ Hosp Tuebingen, Inst Clin Epidemiol & Appl Biometry, Tubingen, Germany
[10] Univ Hosp Tuebingen, Tubingen, Germany