title: [JPPP].
authors.affiliation: Department of Internal Medicine, Keio University School of Medicine.
authors.forename: Kenji
authors.initials: K
authors.lastname: Yokoyama
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Ikeda
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001241:Aspirin / Q000008:administration & dosage*; D006801:Humans; D007564:Japan; D008875:Middle Aged; D017410:Practice Guidelines as Topic; D013927:Thrombosis / Q000517:prevention & control*
chemical_list: D001241:Aspirin