title: The North American ticlopidine aspirin stroke study: structure, stratification variables, and patient characteristics.
mesh_terms: D000367:Age Factors; D000368:Aged; D000925:Anticoagulants / Q000627:therapeutic use*; D001241:Aspirin / Q000627:therapeutic use*; D002561:Cerebrovascular Disorders / Q000517:prevention & control*; D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011897:Random Allocation; D013876:Thiophenes / Q000627:therapeutic use*; D013988:Ticlopidine
chemical_list: D000925:Anticoagulants; D013876:Thiophenes; D013988:Ticlopidine; D001241:Aspirin