[1] Brigham & Womens Hosp, Dept Radiol, Boston, MA 02115 USA
[2] Univ Manitoba, Dept Radiol, Winnipeg, MB R3T 2N2, Canada
[3] Brigham & Womens Hosp, Dept Anesthesiol, Boston, MA 02115 USA
[4] Dana Farber Canc Inst, Dept Med, Boston, MA 02115 USA
[5] Brigham & Womens Hosp, Dept Endocrinol, Boston, MA 02115 USA