The effect of intra-articular methadone on postoperative pain following anterior cruciate ligament reconstruction. - Stewart DJ; Lambert EW; Stack KM; Pellegrini J; Unger DV; Hood RJ; Stewart, David J; Lambert, Edward W; Stack, Kimberly M; Pellegrini, Joseph; Unger, Daniel V; Hood, Raymond J (Journal of Bone & Joint Surgery, American Volume, 2005)