1. University of North Carolina School of Medicine, Chapel Hill, NC, USA
2. Department of Ophthalmology, Second Hospital of Lanzhou University, Lanzhou, China
3. Department of Ophthalmology, University of North Carolina Kittner Eye Center, Chapel Hill, NC, USA
4. Department of Ophthalmology, University of Washington, Seattle, WA, USA
5. University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC, USA
6. Department of Neonatology, Second Hospital of Lanzhou University, Lanzhou, China
7. Department of Ophthalmology, Seattle Children’s Hospital, Seattle, WA, USA