1. Albright, F., Burnett, C. H., Smith, P. H., and Parson, W. (1942). Endocrinology, 30, 922.
2. Forbes, A. P., and Henneman, P. H. (1952). Trans. Ass. Amer. Phycns., 65, 337.
3. Carnes, W. H. (1950). Amer. J. Path., 26, 736.
4. Ellsworth, R., and Howard, J. E. (1934). Bull. Johns Hopk. Hosp., 55, 296.
5. Frame, B., and Carter, S. (1955). Neurology, 5, 297.