Chen G, Tzekov R, Li W, Jiang F, Mao S, Tong Y. Subthreshold Micropulse Diode Laser Versus Conventional Laser Photocoagulation for Diabetic Macular Edema: A Meta-Analysis of Randomized controlled Trials. Retina. 2016;36(11):2059-2065. doi:10.1097/iae.0000000000001053