Depressive Disorder, Major

• GSK Investigational Site — Cerritos, California, United States
• GSK Investigational Site — San Diego, California, United States
• GSK Investigational Site — Torrance, California, United States
• GSK Investigational Site — Jacksonville, Florida, United States

• GSK Investigational Site — Hoffman Estates, Illinois, United States
• GSK Investigational Site — Park Ridge, Illinois, United States
• GSK Investigational Site — New York, United States
• GSK Investigational Site — Columbus, Ohio, United States

• Wisconsin Center for Sleep Medicine and Research — Madison, Wisconsin, United States

• Research Site — Dortmund, Germany

Not specified

• National Institutes of Health Clinical Center, 9000 Rockville Pike — Bethesda, Maryland, United States

• New York State Psychiatric Institute — New York, United States
• University of Ottawa, Institute of Mental Health Research — Ottawa, Ontario, Canada

• Stanford University School of Medicine — Stanford, California, United States

• Beijng, China
• Changsha, China
• Hangzhou, China
• Nanjing, China

• Pharmacology Research Institute (PRI) — Newport Beach, California, United States
• Institute for Advanced Medical Research — Alpharetta, Georgia, United States
• Chicago Research Center, Inc. — Chicago, Illinois, United States
• Alexian Brothers Center for Psychiatric Research — Hoffman Estates, Illinois, United States