1. Sleep and Epilepsy Center, Neurocenter of the Southern Switzerland, Civic Hospital (EOC) of Lugano, Lugano, Switzerland
2. Institute for Bio-Medical Problems, Russian Academy of Science, Moscow, Russia
3. Sleep Center, Scientific Institute of Pavia, Salvatore Maugeri Foundation IRCCS, Pavia, Italy
4. Department of Psychiatry, Sleep Disorders Clinical Research Program, Massachusetts General Hospital, Harvard Medical School, Boston, MA