[Corticoids in the treatment of lung tuberculosis. Animal experimental studies. VI. Comparative studies on the fine morphological structures of experimentally induced tubercle under prednisolone-streptomycin or isonicotinic acid hydrazidestreptomycin and combined isonicotinic acid hydrazidestreptomycin-prednisolone treatment of inoculation tuberculosis in guinea pigs with reference to the change in the immunobiological processes].