[1] Univ Hosp Zurich, Dept Pulmonol, Zurich, Switzerland
[2] Univ Hosp Zurich, Sleep Disorders Ctr, Zurich, Switzerland
[3] Univ Zurich, Dept Epidemiol, Biostat & Prevent Inst, Zurich, Switzerland
[4] Tech Univ Dresden, Univ Hosp Carl Gustav Carus, Inst Clin Chem & Lab Med, Dresden, Germany
[5] Univ Hosp Zurich, Dept Endocrinol Diabetol & Nutr, Zurich, Switzerland
[6] Univ Zurich, Dept Pulmonol, Univ Zurich Hosp, Ctr Integrat Human Physiol, Zurich, Switzerland
[7] Univ Zurich, Sleep Disorders Ctr, Univ Zurich Hosp, Ctr Integrat Human Physiol, Zurich, Switzerland