Affiliations

• ¹ Center for Preventive Ophthalmology and Biostatistics, Department of Ophthalmology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Scheie Eye Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA. Electronic address: gsying@pennmedicine.upenn.edu.
• ² Center for Pharmacoepidemiology Research and Training, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Leonard Davis Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Scheie Eye Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.