[1] Western Mchigan Univ, Homer Stryker MD Sch Med, Dept Orthopaed Surg, Kalamazoo, MI 49007 USA
[2] Univ New Mexico, Dept Anesthesiol & Crit Care Med, Albuquerque, NM USA
[3] Harlem Hosp Med Ctr, New York, NY USA
[4] Hosp Special Surg, Weill Cornell Med Coll, New York, NY USA
[5] Univ New Mexico, Dept Orthopaed & Rehabil, Albuquerque, NM USA