Sleep Initiation and Maintenance Disorders

• 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

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

• Catharina ziekenhuis Eindhoven — Eindhoven, North Brabant, Netherlands

• San Francisco VA Health Care System — San Francisco, California, United States