1,020
Participants
Start Date
October 31, 2013
Primary Completion Date
February 28, 2015
Study Completion Date
February 28, 2015
Outdoor activity in recess time
Outdoor activity in recess time
Department of Ophthamology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung university College of Medicine, Kaohsiung City
Ministry of Health and Welfare, Taiwan
OTHER_GOV
Chang Gung Memorial Hospital
OTHER