[Observational research: a fundamental tool for clinical practice].
Tavazzi
Luigi
L
Dipartimento di Cardiologia, IRCCS Policlinico San Matteo, Pavia. l.tavazzi@smatteo.pv.it
Tognoni
Gianni
G
Maggioni
Aldo Pietro
AP
D000328:Adult; D000368:Aged; D002309:Cardiology; D002318:Cardiovascular Diseases / Q000628:therapy; D016903:Drug Monitoring; D016021:Epidemiologic Studies; D006801:Humans; D007558:Italy; D017063:Outcome Assessment, Health Care; D017410:Practice Guidelines as Topic; D011446:Prospective Studies; D016032:Randomized Controlled Trials as Topic; D012106:Research; D012189:Retrospective Studies