[1] HARVARD UNIV,SCH MED,DEPT BIOL CHEM,CARBOHYDRATE RES LAB,BOSTON,MA 02115
[2] EUNICE KENNEDY SHRIVER CTR MENTAL RETARDAT INC,DEPT BIOCHEM,WALTHAM,MA
[3] TUFTS UNIV,SCH MED,SCH VET MED,BOSTON,MA 02111
[4] HARVARD UNIV,SCH MED,DEPT MED,BOSTON,MA 02115