[1] MEM UNIV NEWFOUNDLAND, HLTH SCI CTR, DIV NEPHROL, St John A1B 3V6, NEWFOUNDLAND, CANADA
[2] HARVARD UNIV, THORNDIKE LAB, BOSTON, MA 02115 USA
[3] HARVARD UNIV, CTR DIGEST DIS, BOSTON, MA 02115 USA
[4] BETH ISRAEL HOSP, DEPT MED, DIV GASTROENTEROL, BOSTON, MA 02215 USA
[5] HARVARD UNIV, SCH MED, BOSTON, MA 02115 USA
[6] ROYAL VICTORIA HOSP, TRANSPLANT SERV, MONTREAL H3A 1A1, QUEBEC, CANADA
[7] MCGILL UNIV, MONTREAL H3A 2T5, QUEBEC, CANADA
[8] CHARLES A DANA RES INST, BOSTON, MA USA