1. Department of Psychiatry and Mental Health, Centro Hospitalar Tondela-Viseu, Viseu, Portugal
2. Minnesota Regional Sleep Disorders Center and Departments of Psychiatry, Hennepin County Medical Center and University of Minnesota Medical School, Minnesota, Minneapolis
3. Instituto Politécnico de Saúde do Norte–CESPU, Famalicão, Portugal
4. Sleep Unit, Centro Cardiovascular da Universidade de Lisboa, Lisbon School of Medicine, Lisbon, Portugal
5. European Sleep Center, Lisbon, Portugal