[1] LAHEY CLIN MED CTR, ENDOCRINOL SECT, BURLINGTON, MA 01805 USA
[2] LAHEY CLIN MED CTR, DEPT NEUROSURG, BURLINGTON, MA 01805 USA
[3] TUFTS UNIV, DEPT PATHOL, BOSTON, MA 02111 USA
[4] NEW ENGLAND MED CTR, BOSTON, MA 02111 USA
[5] HARVARD UNIV, NEW ENGLAND DEACONESS HOSP, SCH MED, DEPT PATHOL, BOSTON, MA 02215 USA
[6] UNIV ROCHESTER, MED CTR, ENDOCRINE METAB UNIT, ROCHESTER, NY 14627 USA