[1] JOHNS HOPKINS UNIV, SCH MED, BALTIMORE, MD 21224 USA
[2] NIAMDD, CLIN ENDOCRINOL BRANCH, BETHESDA, MD 20205 USA
[3] NCI, BIOMETRY BRANCH, BETHESDA, MD 20205 USA
[4] MEM SLOAN KETTERING CANC CTR, DEPT MED, NEW YORK, NY 10021 USA
[5] CORNELL UNIV, COLL MED, ITHACA, NY 14853 USA
[6] MID ATLANTIC NEPHROL CTR, CAMP SPRINGS, MD 20023 USA