[1] Univ Ulsan, Ulsan Univ Hosp, Dept Surg, Coll Med, Ulsan, South Korea
[2] Indiana Univ, Dept Anesthesiol, Indianapolis, IN 46204 USA
[3] Yonsei Univ, Gangnam Severance Hosp, Dept Radiol, Coll Med, Seoul, South Korea
[4] Yonsei Univ, Biostat Collaborat Unit, Coll Med, Seoul, South Korea
[5] Yonsei Univ, Gangnam Severance Hosp, Dept Pathol, Coll Med, Seoul, South Korea
[6] Yonsei Univ, Gangnam Severance Hosp, Dept Surg, Coll Med, 211 Eonju Ro, Seoul 06273, South Korea
[7] Yonsei Univ, Severance Hosp, Dept Surg, Coll Med, Seoul, South Korea