[1] Fdn Blood Res, Scarborough, ME 04070 USA
[2] Johns Hopkins Sch Med, Baltimore, MD USA
[3] Univ Edinburgh, Edinburgh, Midlothian, Scotland
[4] Univ N Carolina, Chapel Hill, NC USA
[5] Calif State Dept Hlth, Berkeley, CA USA
[6] Penn Hosp, Philadelphia, PA 19107 USA
[7] Roche Mol Syst, Alameda, CA USA
[8] Zeneca Diagnost, Northwich, Cheshire, England
[9] Cyst Fibrosis Fdn, Bethesda, MD USA
[10] Vincent Mem Obstet Assoc, Boston, MA USA
[11] Univ Calif Los Angeles, Sch Med, Los Angeles, CA USA
[12] Cent Manchester Hlth Care Trust, Manchester, Lancs, England
[13] Massachusetts Gen Hosp, Boston, MA 02114 USA
[14] Univ Miami, Sch Med, Miami, FL USA
[15] March Dimes Birth Defects Fdn, White Plains, NY USA
[16] Genzyme, Framingham, MA USA
[17] Univ Missouri, Columbia, MO USA
[18] Univ Penn, Philadelphia, PA 19104 USA
[19] Mt Sinai Sch Med, New York, NY USA
[20] Allegheny Univ Hlth Sci, Pittsburgh, PA USA
[21] Univ Rochester, Sch Med, Rochester, NY USA
[22] Univ Chicago, Chicago, IL 60637 USA
[23] Rapigene Inc, Bothell, WA USA
[24] Wolfson Inst Prevent Med, London, England
[25] Alliance Genet Support Grp, Washington, DC USA
[26] Kaiser Permanente No Calif, San Jose, CA USA