1. Department of Obstetrics and Gynecology, University of North Carolina, Chapel Hill, North Carolina, USA.
2. University of North Carolina—MIGS Division, Hillsborough, North Carolina, USA.
3. Department of Obstetrics, Gynecology, and Reproductive Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA.
4. Department of Biostatistics, University of North Carolina, Chapel Hill, North Carolina, USA.