Timing of endoscopy in high-risk patients with acute upper gastrointestinal bleeding: Results of a multicenter international cohort study Javier Tejedor-Tejada; Benito Hermida; Cristina Camblor; Mohamed Emara; Salem Youssef Mohamed; Jose M. Perez-Pariente;

Ki-67 labelling index is related to the risk classification and prognosis of gastrointestinal stromal tumours: a retrospective study Jian-ping Wang; Lan Liu; Zi-ang Li; Qian Wang; Xiao-yue Wang; Jun Lin;