[1] UNIV MANITOBA, DEPT PHYSIOL, WINNIPEG R3T 2N2, MANITOBA, CANADA
[2] MCGILL UNIV, CTR HUMAN GENET, LADY DAVIS INST MED RES, DEPT BIOL, MONTREAL H3A 2T5, QUEBEC, CANADA
[3] MCGILL UNIV, CTR HUMAN GENET, DEPT MED, MONTREAL H3A 2T5, QUEBEC, CANADA
[4] MCGILL UNIV, CTR HUMAN GENET, DEPT PEDIAT, MONTREAL H3A 2T5, QUEBEC, CANADA
[5] CANC CONTROL AGCY, VANCOUVER, BC, CANADA