title: Mixed effect modeling in analgesia trials.
authors.forename: Steven L
authors.initials: SL
authors.lastname: Shafer
authors.forename: Michel M R F
authors.initials: MM
authors.lastname: Struys
mesh_terms: D002045:Bupivacaine / Q000008:administration & dosage*; D002211:Capsaicin / Q000008:administration & dosage*; D004359:Drug Therapy, Combination; D006801:Humans; D010149:Postoperative Pain / Q000517:prevention & control*; D016032:Randomized Controlled Trials as Topic; D012984:Software; D014147:Tramadol / Q000008:administration & dosage*
chemical_list: D014147:Tramadol; D002211:Capsaicin; D002045:Bupivacaine