title: The case for causal reasoning.
authors.forename: J P
authors.initials: JP
authors.lastname: Kassirer
authors.forename: R I
authors.initials: RI
authors.lastname: Kopelman
mesh_terms: D000182:ACTH Syndrome, Ectopic / Q000175:diagnosis; D000368:Aged; D001984:Bronchial Neoplasms / Q000175:diagnosis*; D018288:Carcinoma, Small Cell / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D011340:Problem Solving