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Guo, Yin, Li Juan Liu, Ping Tang, Yan Yun Lv, Yi Feng, Liang Xu, och Jost B. Jonas. "Outdoor Activity and Myopia Progression in 4-year Follow-up of Chinese Primary School Children: The Beijing Children Eye Study." PLoS One 2017.

Guo, Yin, et al. "Outdoor Activity and Myopia Progression in 4-year Follow-up of Chinese Primary School Children: The Beijing Children Eye Study." PLoS One 2017.