[1] Johns Hopkins Univ, Dept Med, Baltimore, MD USA
[2] Univ Pittsburgh, Dept Pediat, Pittsburgh, PA 15260 USA
[3] Univ Pittsburgh, Ctr Womens Hlth Res & Innovat CWHRI, Pittsburgh, PA USA
[4] Natl Jewish Hlth, Dept Med, Denver, CO USA
[5] Natl Jewish Hlth, Dept Pediat, Denver, CO USA
[6] Emory Univ, Dept Med, Div Endocrinol Metab & Lipids, Atlanta, GA 30322 USA
[7] Seattle Childrens Hosp, Cyst Fibrosis Fdn, Therapeut Dev Network, Seattle, WA USA
[8] Univ Washington, Dept Med, Seattle, WA USA
[9] Univ Texas Southwestern Med Ctr Dallas, Dept Med, 5323 Harry Hines Blvd,Mail Code 8558, Dallas, TX 85390 USA