1. Brit;GRACIANSKY, D.E.; P.; GRUPPER, C.;J. vener. Dis,1961
2. New Engl. J7;FULFORD, K.W.M.; BROSTOFF, J.;Ibid,1972
3. Acta derm.-;Med,1968
4. venereol. (Stockh.), 48, 15 HEYMAN, A., SHELDON, W. H., and EVANS, L. D. (1952)
5. HOEKENGA, M. T., and FARMER, T. W. (1948) Arch. intern. Med., 82, 611