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Cluster-randomized controlled trial of the effects of free glasses on purchase of children's glasses in China: The PRICE (Potentiating Rural Investment in Children's Eyecare) study
Wang X,
Congdon N,
Ma Y,
Hu M,
Zhou Y,
et al.
(2017)
Cluster-randomized controlled trial of the effects of free glasses on purchase of children's glasses in China: The PRICE (Potentiating Rural Investment in Children's Eyecare) study.
PLOS ONE 12(11): e0187808.
https://doi.org/10.1371/journal.pone.0187808