1. Manchester Academic Health Science Centre (P.C.), Royal Manchester Children's Hospital, Manchester M13 9WL, United Kingdom
2. Ipsen Pharma SAS (M.B., P.Du., P.De., P.M., L.N., E.P., A.T., Z.Z.), 92100 Boulogne-Billancourt, France; Celera Corporation (A.G.), Alameda, California 94502