1. Department of Optometry and Vision Science, School of Optometry, University of Alabama at Birmingham, Birmingham, AL 35233, USA
2. Department of Dermatology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35233, USA
3. Department of Ophthalmology and Vision Sciences, Heersink School of Medicined, University of Alabama at Birmingham, Birmingham, AL 35233, USA