[1] Univ N Carolina, Chapel Hill, NC 27515 USA
[2] Univ Pittsburgh, Pittsburgh, PA USA
[3] Northwell Hlth, Manhasset, NY USA
[4] Univ Washington, Seattle, WA 98195 USA
[5] Massachusetts Gen Hosp, Boston, MA 02114 USA
[6] Univ Calif San Diego, San Diego, CA 92103 USA
[7] Rush Univ, Med Ctr, Chicago, IL 60612 USA
[8] Cyst Fibrosis Fdn, Bethesda, MD USA