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published and unpublished randomised controlled trials (RCTs) that compared the antiemetic effects of ⩾1 g of ginger with placebo for preventing postoperative nausea and vomiting and included sufficient data to calculate the incidence of …
For correspondence: Dr N Chaiyakunapruk, School of Pharmaceutical Sciences, Naresuan University, Phitsanulok, Thailand.
Source of funding: Thailand Research Fund.
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