[1] UNIV CALIF DAVIS,SACRAMENTO MED CTR,DIV GASTROINTESTINAL,4301 X ST,SACRAMENTO,CA 95817
[2] HARVARD UNIV,BETH ISRAEL HOSP,CHARLES A DANA RES INST,THORNDIKE LAB,BOSTON,MA 02215
[3] HARVARD UNIV,BETH ISRAEL HOSP,DEPT MED,DIV HEMATOL ONCOL,BOSTON,MA 02215
[4] INSERM,U271,F-69424 LYONS 03,FRANCE
[5] CTR BLOOD RES,BOSTON,MA 02115