title: Reply.
authors: Center for Clinical Trials and Evidence Synthesis, Department of Epidemiology, Johns Hopkins Bloomberg School, Baltimore, Maryland. Electronic address: tli19@jhu.edu.
authors: Tianjing
authors: T
authors: Li
authors: Center for Clinical Trials and Evidence Synthesis, Department of Epidemiology, Johns Hopkins Bloomberg School, Baltimore, Maryland.
authors: Kristina
authors: K
authors: Lindsley
authors: Center for Clinical Trials and Evidence Synthesis, Department of Epidemiology, Johns Hopkins Bloomberg School, Baltimore, Maryland.
authors: Benjamin
authors: B
authors: Rouse
authors: Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
authors: Hwanhee
authors: H
authors: Hong
authors: Center for Clinical Trials and Evidence Synthesis, Department of Epidemiology, Johns Hopkins Bloomberg School, Baltimore, Maryland.
authors: Qiyuan
authors: Q
authors: Shi
authors: The Dana Center for Preventive Ophthalmology, Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore Maryland.
authors: David S
authors: DS
authors: Friedman
authors: Cochrane Eyes and Vision, London School of Hygiene & Tropical Medicine, London, United Kingdom.
authors: Richard
authors: R
authors: Wormald
authors: Center for Clinical Trials and Evidence Synthesis, Department of Epidemiology, Johns Hopkins Bloomberg School, Baltimore, Maryland.
authors: Kay
authors: K
authors: Dickersin