title: [Opportunistic infection].
authors.affiliation: Second Department of Internal Medicine, Oita Medical University.
authors.forename: I
authors.initials: I
authors.lastname: Tokimatsu
authors.forename: M
authors.initials: M
authors.lastname: Nasu
mesh_terms: D016026:Bone Marrow Transplantation; D003095:Collagen Diseases / Q000150:complications; D016208:Databases, Factual; D015658:HIV Infections / Q000150:complications; D019337:Hematologic Neoplasms / Q000150:complications; D006801:Humans; D016867:Immunocompromised Host; D020407:Internet; D008175:Lung Neoplasms / Q000150:complications; D009894:Opportunistic Infections / Q000150:complications / Q000453:epidemiology*; D016377:Organ Transplantation; D011014:Pneumonia / Q000150:complications / Q000453:epidemiology*