PubMed:: "Meperidine"[Mesh] OR pethidine[tiab] OR isonipecain[tiab] OR dolsin[tiab] OR dolosal[tiab] OR dolin[tiab] OR "operidine epj i"[tiab] OR dolantin[tiab] OR dolargan[tiab] OR "meperidine hydrochloride" [tiab] OR lidol[tiab] OR lydol[tiab] OR demerol[tiab] OR dolcontral[tiab];; Embase.com:: 'pethidine'/exp OR pethidine:ab,ti OR dolsin:ab,ti OR dolosal:ab,ti OR dolin:ab,ti OR dolantin:ab,ti OR dolargan:ab,ti OR 'meperidine hydrochloride':ab,ti OR lidol:ab,ti OR lydol:ab,ti OR demerol:ab,ti OR dolcontral:ab,ti OR meperidine:ab,ti;; Cochrane Library:: (meperidine OR pethidine OR dolsin OR dolosal OR dolin OR dolantin OR dolargan OR "meperidine hydrochloride" OR lidol OR lydol OR demerol):ti,ab,kw
