title: A hospital study of the Providence group, with particular reference to subgrouping and the possible presence of R factors.
mesh_terms: D000166:Acridines / Q000494:pharmacology; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects; D006761:Hospitals; D006801:Humans; D007668:Kidney / Q000382:microbiology; D008826:Microbial Sensitivity Tests; D011511:Proteus / Q000145:classification* / Q000187:drug effects / Q000378:metabolism; D014556:Urine / Q000382:microbiology
chemical_list: D000166:Acridines