1. KLINTWORTH, G. K., HOLLINGSWORTH, A. S., LUSMAN, P. A., and BRADFORD, W. D. (1973) Arch. Ophthal., go, 45
2. REID, J. D., SCHERER, J. H., HERBUT, P. A., and IRVING, H. (1942) J. Lab. clin. Med., 27, 419
3. SMITH, R. E., O'CONNOR, G. R., HALDE, C. J., SCALARONE, M. A., and EASTERBROOK, W. M. (1973) Ibid., 76, 284 WALMA, D., and SCHLAEGEL, T. F. (1964) Ibid., 57, I07 WOODS, A. c., and WAHLEN, H. E. (1960) Ibid., 49, 205