[1] Parent Project Muscular Dystrophy, Richmond, VA USA
[2] NHGRI, Bethesda, MD 20892 USA
[3] Seattle Childrens Res Inst, Seattle, WA USA
[4] Johns Hopkins Sch Med, Baltimore, MD USA
[5] Johns Hopkins Bloomberg Sch Publ Hlth, Baltimore, MD USA
[6] Childrens Natl Med Ctr, Washington, DC USA
[7] Leiden Univ, Med Ctr, Leiden, Netherlands