1. Alleyne, G A O & Young, V H (1967). Clin. Sci. 33, 189.
2. Anderson, E, Bates, R W, Hawthorne, E, Haymaker, W, Knowlton, K, Rioch, D M, Spence, W T & Wilson, H (1957). Recent Prog. Hormone Res. 13, 21.
3. Cade, R, Shires, D L, Barrow, M V & Thomas, W C (1967). J. clin. Endocr. 27, 800.
4. Cardus, D, Vallbona, C, Vogt, F B, Spencer, W A, Lipscomb, H S & Eik-Nes, K B (1965). Aero. Med., 36 (6), 524.
5. Claus-Walker, J Submitted to Clin. Chem. 1968.