12.Saw SM, Hong RZ, Zhang MZ, et al. Nearwork activity and myopia in rural and urban schoolchildren in China. J Pediatr Ophthalmol Strabismus. 2001 May-Jun;38(3):149-55.

12.Saw SM, Hong RZ, Zhang MZ, et al. Nearwork activity and myopia in rural and urban schoolchildren in China. J Pediatr Ophthalmol Strabismus. 2001 May-Jun;38(3):149-55.