[1] Purdue Pharma LP, Norwalk, CT 06850 USA
[2] Montefiore Med Ctr, Dept Anesthesiol, Pain Serv, Bronx, NY 10467 USA
[3] Long Isl Jewish Med Ctr, Inst Oncol, New Hyde Pk, NY 11042 USA
[4] N Shore Univ Hosp, Don Monti Div Hematol Oncol, Manhasset, NY USA
[5] Vanderbilt Univ Sch Med, Dept Anesthesiol, Nashville, TN USA