1. According to the Centers for Disease Control and Prevention's National Center for Health Statistics (NCHS), the rate of preterm births grew by more than 20% between 1990 and 2006, and since then has declined slightly, to 12.3% of all births in 2008. Martin J, Osterman M, Sutton P. Are preterm births on the decline in the United States? Recent data from the National Vital Statistics System. NCHS Data Brief 2010 39 www.cdc.gov/nchs/data/databriefs/db39.pdf
2. Policy Statement of the Section on Ophthalmology, American Academy of Pediatrics; American Academy of Ophthalmology; and the American Association for Pediatric Ophthalmology and Strabismus;Screening examination of premature infants for retinopathy of prematurity;Pediatrics,2006
3. Ibid
4. Remote image based retinopathy of prematurity diagnosis: A receiver operating characteristic analysis of accuracy;Chiang;Br J Ophthalmol,2006
5. Screening examination of premature infants for retinopathy of prematurity