[1] AUTONOMOUS UNIV BARCELONA,HOSP SANTA CREU & SANT PAU,NUCL MED UNIT,AVDA PARC CLARET 167,E-08025 BARCELONA,SPAIN
[2] AUTONOMOUS UNIV BARCELONA,HOSP SANTA CREU & SANT PAU,DEPT SURG,E-08025 BARCELONA,SPAIN
[3] AUTONOMOUS UNIV BARCELONA,HOSP SANTA CREU & SANT PAU,DEPT GASTROENTEROL,E-08025 BARCELONA,SPAIN