[1] Catholic Univ Korea, Daejeon St Marys Hosp, Coll Med, Dept Anaesthesiol & Pain Med, 64 Daeheung Ro, Daejeon 34943, South Korea
[2] Catholic Univ Korea, Dept Anaesthesiol & Pain Med, Coll Med, Seoul, South Korea
[3] Catholic Univ Korea, Daejeon St Marys Hosp, Coll Med, Dept Orthopaed Surg, Daejeon, South Korea
[4] Catholic Univ Korea, Dept Orthopaed Surg, Coll Med, Seoul, South Korea