Factors Underlying Different Myopia Prevalence between Middle- and Low-income Provinces in China - Zhongqiang Zhou; Xiaochen Ma; Hongmei Yi; Pang, Xiaopeng; Yaojiang Shi; Qianyun Chen; Mirjam E. Meltzer; Carlos Price-Sanchez; Mingguang He; Scott Rozelle; Ian Morgan; Nathan Congdon* (Ophthalmology, 2015)