1 Lawrence Yang, Department of Epidemiology, Mailman School of Public Health, Columbia University, 722 West 168th Street, Room 1610, New York, NY 10032, USA. Email: lhy2001@columbia.edu; Michael Phillips, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, China, Departments of Psychiatry and Global Health, Emory University, Atlanta, USA, and WHO Collaborating Center for Research and Training in Suicide Prevention, Beijing Hui Long Guan Hospital, Beijing, China; Ezra Susser, Global Mental Health Program, Mailman School of Public Health, Columbia University, and New York State Psychiatric Institute, New York, USA.