1. Sleep Unit Centro Cardiovascular da Universidade de Lisboa, Lisbon School of Medicine Lisbon Portugal
2. International Center on Clinical Sleep Medicine and Research Bahiana School of Medicine and Public Health Salvador Brazil
3. European Sleep Center Lisbon Portugal
4. Cardiovascular Autonomic Function Lab Centro Cardiovascular da Universidade de Lisboa, Lisbon School of Medicine Lisbon Portugal
5. Department of Child Health University of Missouri School of Medicine Columbia USA