[1] UNIV ALBERTA,MED RES COUNCIL CANADA,PROT STRUCT & FUNCT GRP,EDMONTON T6G 2H7,ALBERTA,CANADA
[2] UNIV CALIF SAN FRANCISCO,SCH MED,DEPT PEDIAT,SAN FRANCISCO,CA 94143
[3] UNIV ALBERTA,DEPT BIOCHEM,EDMONTON T6G 2H7,ALBERTA,CANADA
[4] UNIV CALIF SAN FRANCISCO,SCH DENT,DEPT STOMATOL,SAN FRANCISCO,CA 94143