[1] RHODE ISL HOSP, DEPT SURG, PROVIDENCE, RI 02902 USA
[2] BROWN UNIV, DIV BIOL SCI, PROVIDENCE, RI 02912 USA
[3] BETH ISRAEL HOSP, DEPT ENDOCRINOL, BOSTON, MA 02215 USA
[4] BETH ISRAEL HOSP, DEPT RADIOL, BOSTON, MA 02215 USA
[5] BRIDGEPORT HOSP, DEPT RADIOL, BRIDGEPORT, CT 06602 USA