1 Department of Psychology, Stanford University, Stanford CA, USA. Electronic address: bahmanid@stanford.edu.
2 University of Basel, University Psychiatric Clinics, Center for Affective-, Stress- and Sleep Disorders, Basel, Switzerland; University of Basel, Faculty of Medicine, Department of Sport, Exercise and Health, Division of Sport Science and Psychosocial Health, Basel, Switzerland; Kermanshah University of Medical Sciences, Sleep Disorders Research Center, Kermanshah, Iran. Electronic address: serge.brand@upk.ch.