Analgesia effect of different concentrations of sulfentanyl combined with transversus abdominis plane block after cesarean section 
Guo Zheyi, Deng Jiaojiao
International Medicine and Health Guidance News . 2022, (3): 311 -314 .  DOI: 10.3760/cma.j.issn.1007-1245.2022.03.004

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