1. From the Ocular Surface Center, Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas; and the 2School of Ophthalmology and Optometry, Wenzhou Medical College, Wenzhou, Zhejiang, China.
2. From the Ocular Surface Center, Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas; and