1. From the Ocular Surface Center, Cullen Eye Institute, Baylor College of Medicine, Department of Ophthalmology, Houston, Texas;
2. From the Ocular Surface Center, Cullen Eye Institute, Baylor College of Medicine, Department of Ophthalmology, Houston, Texas;2Third Hospital of Hebei Medical University, Shijiazhuang, China.
3. Allergan, Inc., Irvine, California; and the