title: Time-related confounders and intermediate variables.
authors.forename: N
authors.initials: N
authors.lastname: Pearce
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000150:complications / Q000188:drug therapy / Q000401:mortality*; D015986:Confounding Factors, Epidemiologic; D006801:Humans; D011020:Pneumonia, Pneumocystis / Q000150:complications / Q000188:drug therapy*; D012307:Risk Factors; D013997:Time Factors