[1] NATL AUTONOMOUS UNIV MEXICO,CTR INVEST INGN GENET & BIOTECH,DEPT BIOQUIM,APARTADO POSTAL 70479,MEXICO CITY 04510,DF,MEXICO
[2] NATL AUTONOMOUS UNIV MEXICO,INST INVEST BIOMED,MEXICO CITY 04510,DF,MEXICO
[3] UNIV CAPE TOWN,SCH MED,CAPE TOWN 7925,SOUTH AFRICA
[4] TULANE UNIV,HEBERT RES CTR,BELLE CHASE,LA 70037
[5] UNIV TEXAS,HLTH SCI CTR,DALLAS,TX 75235