Dyssomnias

• Hong Kong Metropolitan University — Hong Kong

• 7/F, Sleep Assessment Unit, Shatin Hospital, 33 A Kung Kok Street, Ma On Shan, New Territories — Hong Kong

• Peking University People's Hospital — Beijing, China

• Mayo Clinic in Rochester — Rochester, Minnesota, United States

Not specified

Not specified

• WSU Research Clinic — Spokane, Washington, United States

• The University of Hong Kong — Hong Kong

• The Hong Kong Polytechnic University — Hung Hom, Kowloon, Hong Kong

• Sleep Research Clinic and Laboratory, Department of Psychology, The University of Hong Kong — Hong Kong