1 Blanton Eye Institute, Houston Methodist Hospital, Houston, Tex.
2 School of Medicine, University of Texas Medical Branch, Galveston, Tex.
3 Singapore National Eye Center, Singapore;; Singapore Eye Research Institute, Singapore;; Duke-NUS Medical School, Singapore;; Copenhagen University Hospital, Copenhagen, Denmark.
4 Blanton Eye Institute, Houston Methodist Hospital, Houston, Tex.;; Weill Cornell Medicine, New York, NY;; University of Texas Medical Branch, Galveston, Tex.;; University of Texas MD Anderson Cancer Center, Houston, Tex.;; Texas A&M College of Medicine, Bryan, Tex.;; University of Iowa Hospitals and Clinics, Iowa City, Iowa;. Electronic address: aglee@houstonmethodist.org.