[1] WAYNE STATE UNIV,SCH MED,DEPT MOLEC BIOL & GENET,540 E CANFIELD,DETROIT,MI 48201
[2] WAYNE STATE UNIV,SCH MED,CTR MOLEC BIOL,DETROIT,MI 48201
[3] KYOTO PREFECTURAL UNIV MED,DEPT PREVENT MED,KYOTO 602,JAPAN
[4] FREE UNIV AMSTERDAM,DEPT GASTROENTEROL,1007 MC AMSTERDAM,NETHERLANDS
[5] FREE UNIV AMSTERDAM,DEPT HUMAN GENET,1007 MC AMSTERDAM,NETHERLANDS