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Patient-controlled intravenous tramadol versus patient-controlled intravenous hydromorphone for analgesia after secondary cesarean delivery: a randomized controlled trial to compare analgesic, anti-anxiety and anti-depression effects.
Duan G, Bao X, Yang G, Peng J, Wu Z, Zhao P, Zuo Z, Li H. Duan G, et al. Among authors: wu z. J Pain Res. 2018 Dec 18;12:49-59. doi: 10.2147/JPR.S184782. eCollection 2019. J Pain Res. 2018. PMID: 30588079 Free PMC article.
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