BACKGROUND Acute gastrointestinal(GI)graft-vs-host disease(aGVHD)is the most complication of hematopoietic stem cell transplant(HSCT)in patients with hematologi
BACKGROUND Recently,with the advent of more advanced devices and endoscopic techniques,endoscopic retrograde cholangiopancreatography(ERCP)in Billroth II(B-II)p