title: Non-statistical key issues in conducting sensible observational studies to resolve clinical questions.
authors.affiliation: Department of Clinical Pharmacology & Therapeutics, University of the Ryukyus Graduate School of Medicine.
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Ueda
mesh_terms: D001026:Coronary Artery Bypass / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007239:Infections / Q000401:mortality*; D008297:Male; D011183:Postoperative Complications / Q000401:mortality*; D051436:Renal Insufficiency, Chronic / Q000401:mortality*