1. Cf. Rich and Follis, Bull. Johns Hopkins Hosp., 62, 77 (1938). Greey, Campbell and Culley, Proc. Soc. Exp. Biol. and Med., 39, 22 (1938). Buttle and Parish, Brit. Med. J., 2, 776 (1938).
2. Feldman and Hinshaw, Proc. Staff Meet., Mayo Clin., 14, 174 (1939).
3. Birkhaug, Brit. Med. J., 2, 54 (1939).
4. Ballon, Guernon and Simon, Amer. Rev. Tuberculosis, 47, 217 (1942).
5. Hinshaw and Feldman, J. Amer. Med. Assoc., 117, 1066 (1941). Feldman, Hinshaw and Moses, Amer. Rev. Tuberculosis, 45, 303 (1942).