Unexplained CD4-positive T-cell deficiency in non-HIV patients presenting as a Pneumocystis carinii pneumonia. - Gautier, V.; Chanez, P.; Vendrell, J. P.; Pujol, J. L.; Lacoste, J. Y.; de Faucal, H.; Godard, P.; Michel, F. B. (Clinical & Experimental Allergy, 1991)