[1] MED HSCH HANOVER,ZENTRUM BIOCHEM 2,BIOPHYS CHEM ABT,OE4350,KONSTANTY GUTSCHOW STR 8,D-3000 HANOVER 61,FED REP GER
[2] UNIV TORONTO,HOSP SICK CHILDREN,RES INST,TORONTO M5G 1X8,ONTARIO,CANADA
[3] UNIV TORONTO,DEPT BIOCHEM,TORONTO M5S 1A1,ONTARIO,CANADA
[4] UNIV TORONTO,DEPT CLIN BIOCHEM,TORONTO M5S 1A1,ONTARIO,CANADA