[1] Cyst Fibrosis Fdn, Bethesda, MD 20814 USA
[2] Univ Massachusetts, Sch Med, New England Newborn Screening Program, Worcester, MA 01605 USA
[3] Univ Massachusetts, Sch Med, Dept Pediat, Worcester, MA 01605 USA
[4] Univ Colorado, Hlth Sci Ctr, Dept Pediat, Mike McMorris Cyst Fibrosis Res & Treatment Ctr, Denver, CO 80202 USA
[5] Childrens Hosp, Denver, CO 80218 USA
[6] Univ Wisconsin, State Lab Hyg, Madison, WI USA
[7] Univ Wisconsin, Dept Pediat, Madison, WI USA
[8] Brigham & Womens Hosp, Dept Newborn Med, Boston, MA 02115 USA
[9] Childrens Hosp, Dept Newborn Med, Boston, MA 02115 USA
[10] NHGRI, Behav Res Branch, Bethesda, MD USA
[11] NIH, Warren G Magnuson Clin Ctr, Dept Clin Bioeth, Bethesda, MD 20892 USA
[12] Univ Washington, Sch Med, Dept Pediat, Seattle, WA 98195 USA
[13] Univ Colorado, Hlth Sci Ctr, Dept Prevent Med, Denver, CO 80202 USA
[14] Royal Childrens Hosp, Dept Resp Med, Melbourne, Vic, Australia
[15] Univ Massachusetts, Med Ctr, Dept Pediat, Worcester, MA 01605 USA