[1] Massachusetts Gen Hosp, Div Surg Oncol, Boston, MA 02114 USA
[2] Harvard Med Sch, Dept Surg, Boston, MA USA
[3] Univ Texas, MD Anderson Canc Ctr, Houston, TX USA
[4] Univ Texas, Hlth Sci Ctr, Dept Radiol, San Antonio, TX USA
[5] Cleveland Clin Fdn, Endocrine Surg Sect, Cleveland, OH USA
[6] Beth Israel Med Ctr, Boston, MA USA