[1] UNIV MANITOBA, DEPT PHYSIOL, WINNIPEG, MANITOBA, CANADA
[2] UNIV MANITOBA, DEPT PAEDIAT, WINNIPEG, MANITOBA, CANADA
[3] UNIV MANITOBA, DEPT MED, GERIATRIC TEACHING UNIT, WINNIPEG, MANITOBA, CANADA
[4] HLTH SCI CTR, ENDOCRINE METAB LAB, 700 WILLIAM AVE, WINNIPEG R3E 0Z3, MANITOBA, CANADA