[1] Univ Texas MD Anderson Canc Ctr, Dept Surg Oncol, 1400 Pressler St,Unit 1484, Houston, TX 77030 USA
[2] Univ Texas MD Anderson Canc Ctr, Dept Anesthesiol & Perioperat Med, Houston, TX 77030 USA
[3] Univ Texas MD Anderson Canc Ctr, Dept Biostat, Houston, TX 77030 USA
[4] Univ Texas MD Anderson Canc Ctr, Dept Hlth Serv Res, Houston, TX 77030 USA