[1] Univ Washington, Dept Pediat, Seattle Childrens Res Inst, Seattle, WA 98195 USA
[2] Univ N Carolina, Dept Med, Chapel Hill, NC 27515 USA
[3] Univ Buffalo, Jacobs Sch Med & Biomed Sci, Buffalo, NY USA
[4] Harvard Med Sch, Beth Israel Deaconess Med Ctr, Boston, MA 02115 USA
[5] Western New York Pediat Gastroenterol, Batavia, NY USA
[6] Univ Washington, Seattle Childrens Res Inst, Dept Pediat & Microbiol, Seattle, WA 98195 USA
[7] Univ Penn, Dept Endocrinol, Philadelphia, PA 19104 USA
[8] Childrens Hosp Colorado, Digest Hlth Inst, Aurora, CO USA
[9] Univ Colorado, Sch Med, Aurora, CO USA
[10] Washington Univ, Sch Med, Dept Pediat, St Louis, MO USA
[11] Univ Toronto, Dept Pediat, Toronto, ON, Canada
[12] Univ Washington, Seattle Childrens Res Inst, Dept Pediat & Epidemiol, Seattle, WA 98195 USA
[13] Childrens Hosp Colorado, Dept Pediat, Aurora, CO USA
[14] Univ Minnesota, Masonic Childrens Hosp, Minneapolis, MN USA
[15] Univ Washington, Dept Microbiol, Seattle, WA 98195 USA
[16] Univ Alabama Birmingham, Gregory Fleming James Cyst Fibrosis Res Ctr, Birmingham, AL USA
[17] Seattle Childrens Hosp, Therapeut Dev Network Coordinating Ctr, Seattle, WA USA
[18] Cyst Fibrosis Fdn, Bethesda, MD USA