1. Rudolph C, Rudolph A, Lister GE, First LE, Gershon AA. Rudolph’s pediatrics. 22nd ed. New York, NY: McGraw-Hill Professional; 2011.
2. Zablotsky B, Black LI, Maenner MJ, Schieve LA, Danielson ML, Bitsko RH, et al. Prevalence and trends of developmental disabilities among children in the US: 2009–2017. Pediatrics 2019;144:e20190811.
3. Centers for Disease Control and Prevention. Developmental disabilities increasing in US: www.cdc.gov/features/dsdev_disabilities.
4. Murray CJ, Lopez AD. Quantifying disability: data, methods, and results. Bull World Health Organ. 1994;72:481–94.
5. (IHME), I. f. H. M. a. E. GBDCompareDataVisualization. 2016. http://vizhub.healthdata.org/gbd-compare. Accessed January 2017.