Quittner AL, Eakin MN, Alpern AN, Ridge AK, McLean KA, Bilderback A, Criado KK, Chung SE, Riekert KA. Clustered randomized controlled trial of a clinic-based problem-solving intervention to improve adherence in adolescents with cystic fibrosis. J Cyst Fibros. 2019 11; 18(6):879-885.