[1] COLUMBIA UNIV,COLL PHYS & SURG,H HOUSTON MERRITT CTR STUDY MUSCULAR DYSTROPHY & RELATED DIS,NEW YORK,NY 10032
[2] PRESBYTERIAN HOSP,INST NEUROL,NEW YORK,NY 10032
[3] UNIV ARIZONA,COLL MED,DEPT NEUROL,TUCSON,AZ 85721
[4] UNIV ARIZONA,COLL MED,DEPT PATHOL,TUCSON,AZ 85721