[1] Columbia Univ, Dept Pediat, Med Ctr, New York, NY 10032 USA
[2] NewYork Presbyterian Hosp, Dept Infect Prevent & Control, New York, NY USA
[3] Univ Texas SW Med Ctr Dallas, Dept Pediat, Dallas, TX 75390 USA
[4] Childrens Med Ctr, Dallas, TX 75235 USA
[5] Univ Michigan, Sch Med, Dept Pediat & Communicable Dis, Ann Arbor, MI USA
[6] Univ Michigan, Sch Publ Hlth, Dept Epidemiol, Ann Arbor, MI 48109 USA
[7] Vanderbilt Univ, Med Ctr, Dept Pediat, Nashville, TN 37232 USA
[8] Akron Childrens Hosp, Dept Pediat, Akron, OH USA
[9] Akron Childrens Hosp, Dept Social Work, Little Rock, AR USA
[10] Univ Michigan Hosp, Ann Arbor, MI 48109 USA
[11] Nebraska Med Ctr, Div Pulm, Omaha, NE USA
[12] Northwestern Univ, Dept Med, Feinberg Sch Med, Chicago, IL 60611 USA
[13] Cyst Fibrosis Fdn, Dept Med, Bethesda, MD USA
[14] Ann & Robert H Lurie Childrens Hosp Chicago, Dept Pediat, Chicago, IL USA
[15] Adult Cyst Fibrosis, Silver Spring, MD USA
[16] Boston Childrens Hosp, Dept Infect Prevent & Control, Boston, MA USA
[17] Johns Hopkins Univ, Baltimore, MD USA
[18] Geisel Sch Med Dartmouth, Dartmouth Inst Hlth Policy & Clin Practice, Lebanon, NH USA
[19] Virginia Commonwealth Univ, Childrens Hosp Richmond, Dept Pediat, Richmond, VA USA
[20] Univ Toronto, Dept Med, Toronto, ON, Canada
[21] St Michaels Hosp, Keenan Res Ctr Li Ka Shing Knowledge Inst, Toronto, ON M5B 1W8, Canada
[22] Univ N Carolina, Dept Med, Chapel Hill Med Sch, Chapel Hill, NC USA
[23] Univ N Carolina, Dept Pediat, Chapel Hill Med Sch, Chapel Hill, NC USA