[1] Virginia Mason Clin, Dept Anesthesiol, Seattle, WA 98111 USA
[2] Univ Washington, Seattle, WA 98195 USA
[3] Purdue Pharma LP, Med Res, Stamford, CT USA
[4] Purdue Pharma LP, Clin Pharmacokinet, Stamford, CT USA
[5] Magidom Discovery LLC, Westport, CT USA
[6] Univ Penn, Dept Anesthesia, Philadelphia, PA 19104 USA