Digitoxin for airway inflammation in cystic fibrosis: preliminary assessment of safety, pharmacokinetics, and dose finding - Zeitlin, P L; Diener-West, M; Callahan, K A; Lee, S; Talbot, C C, jr.; Pollard, B; Boyle, M P; Lechtzin, N (Ann Am Thorac Soc, 2017)