1 University of Texas Rio Grande Valley School of Medicine, Edinburg, Tex.
2 Blanton Eye Institute, Houston Methodist Hospital, Houston, Tex.
3 Dell Medical School, University of Texas at Austin, Austin, Tex.
4 University of Texas at San Antonio, San Antonio, Tex.
5 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.