[1] Univ Marburg, Dept Pneumol, Sleep Disorder Unit, Univ Hosp Marburg & Giessen, Marburg, Germany
[2] Univ Marburg, Inst Med Biometry & Epidemiol, Univ Hosp Marburg & Giessen, Marburg, Germany
[3] Univ Marburg, Dept Cardiol, Univ Hosp Marburg & Giessen, Marburg, Germany