title: Subnormal serum creatine kinase activity in a patient with acute myocardial infarction.
mesh_terms: D000368:Aged; D003402:Creatine Kinase / Q000097:blood*; D005188:False Negative Reactions; D006801:Humans; D008297:Male; D009203:Myocardial Infarction / Q000201:enzymology*
chemical_list: D003402:Creatine Kinase