*Department of Clinical Chemistry, Glostrup Hospital, University of Copenhagen, DK-2600 Glostrup.
**Department of Radiology, Glostrup Hospital.
†Division of Endocrinology, Department of Internal Medicine, Hvidovre Hospital, University of Copenhagen, DK-2650 Hvidovre, Denmark.
Reprint requests to Grethe Finn Jensen, M.D., Department of Clinical Chemistry, Glostrup Hospital, DK-2600 Glostrup, Denmark.
This study was supported by grants from P. Carl Petersens Fond, Fabrikant Einar Willumsens Mindelegat and Velux Fonden.
Received: May 22, 1981.