title: Challenges of epidemiological studies of mild cognitive impairment.
authors.forename: Ronald C
authors.initials: RC
authors.lastname: Petersen
mesh_terms: D003072:Cognition Disorders / Q000145:classification / Q000453:epidemiology*; D016208:Databases, Factual; D016021:Epidemiologic Studies; D006801:Humans; D015994:Incidence; D007391:International Cooperation; D015995:Prevalence; D012107:Research Design; D013223:Statistics as Topic