1. Association of Public Health Laboratories. APHL position statement: newborn screening residual dried blood spot specimens. 2013. https://www.aphl.org/policy/Position_Documents/NBS_2013_Newborn_Screening_Residual_Dried_Blood_Spot_Specimens.pdf. Accessed 6 December 2018.
2. Association of Public Health Laboratories. Data retention profile by state. 2015. https://data.newsteps.org/newsteps-web/reports/profile/dataRetention.action. Accessed 9 September 2015.