Kharrazi M, Sacramento C, Comeau AM, Hale JE, Caggana M, Kay DM, Lee R, Reilly B, Thompson JD, Nasr SZ, Kleyn M, Hoffman G, Baker MW, Clarke C, Harris CL, Dorley MC, Fryman H, Sutaria A, Hietala A, Winslow H, Richards H, Therrell BL. Missed Cystic Fibrosis Newborn Screening Cases due to Immunoreactive Trypsinogen Levels below Program Cutoffs: A National Survey of Risk Factors. Int J Neonatal Screen. 2022 Oct 27; 8(4).