Efficacy of graded analgesia in care of pain in patients undergoing Ⅲ -Ⅳ degree mixed hemorrhoidectomy
Lin Aidan, Lin Min, Zhong Guilian
International Medicine and Health Guidance News . 2022, (3): 434 -438 .  DOI: 10.3760/cma.j.issn.1007-1245.2022.03.033

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