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A prospective study of skin location assisted endoscopic band ligation for grade Ⅱ-Ⅲ internal hemorrhoids
LI Shu-ling, LIU Jun-jie
Lingnan Modern Clinics In Surgery . 2022, (02): 187 -190 .  DOI: 10.3969/j.issn.1009-976X.2022.02.013