Effect of outdoor activity on myopia onset and progression in school-aged children in northeast China - the Sujiatun Eye Care Study - Jin, JX; Hua, WJ; Jiang, X; Wu, XY; Yang, JW; Gao, GP; Fang, Y; Pei, CL; Wang, S; Zhang, JZ; Tao, LM; Tao, FB (2015)
rct; evidence grade C; excluded in archive