Major depressive disorder / editor-in-chief, Roger S. McIntyre, M.D., FRCPC, Professor of Psychiartry and Pharmacology, University of Toronto, Toronto, Canada, Chairman and Executive Director, Brain and Congnition Discovery Foundation (BCDF), Toronto, Canada, Director, Depression and Bipolar Support Alliance (DBSA), Chicago, USA, Head, Mood Disorders Psychopharmacology Unit, Professor and Nanshan Scholar, Guangzhou Medical University, Guangzhou, China, Adjunct Professor College of Medicine, Korea University, Seoul, Republic of Korea, Clinical Professor State University of New York (SUNY) Upstate Medical University, Syracuse, New York, USA; associate editors, Carola Rong, MD, Department of Psychiatry and Behavioral Sciences University of Texas Health Science Center at Houston, Houston, TX, United States, Mehala Subramaniapillai, MSC, Mood Disorders Psychopharmacology Unit Toronto Western Hospital United Health Network, toronto, ON, Canada, Yena Lee. HBSC, Mood Disorders Psychopharmacology Unit toronto Western Hospital United Health Network, Toronto, ON, Canada.