title: Possible bias of ascertainment in assessing chemoprophylaxis for cryptosporidiosis.
authors.forename: S D
authors.initials: SD
authors.lastname: Holmberg
authors.forename: A C
authors.initials: AC
authors.lastname: Moorman
mesh_terms: D017088:AIDS-Related Opportunistic Infections / Q000517:prevention & control*; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D015982:Bias; D018791:CD4 Lymphocyte Count; D017291:Clarithromycin / Q000627:therapeutic use*; D003457:Cryptosporidiosis / Q000517:prevention & control*; D006801:Humans; D017828:Rifabutin / Q000627:therapeutic use*
chemical_list: D000900:Anti-Bacterial Agents; D017828:Rifabutin; D017291:Clarithromycin