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Incidence of PONV after THA/TKA. *, P<0.05, significant among different time points in nausea and vomiting groups; **, P<0.001, significant among different time points in nausea and vomiting groups. PONV, postoperative nausea and vomiting; THA, total hip arthroplasty; TKA, total knee arthroplasty.
