1. University of North Carolina School of Pharmacy, USA
2. Cecil G Sheps Center for Health Services Research, University of North Carolina at Chapel Hill, USA
3. Department of International Health, Bloomberg School of Public Health and Department of Ophthalmology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
4. Alcon Research Ltd, Fort Worth, Texas, USA
5. Husson College, Bangor, Maine, USA