title: A variation on single-stage cluster sampling used in a survey of elderly people in Shanghai.
authors.forename: P S
authors.initials: PS
authors.lastname: Levy
authors.forename: E S
authors.initials: ES
authors.lastname: Yu
authors.forename: W T
authors.initials: WT
authors.lastname: Liu
authors.forename: M Y
authors.initials: MY
authors.lastname: Zhang
authors.forename: Z Y
authors.initials: ZY
authors.lastname: Wang
authors.forename: S C
authors.initials: SC
authors.lastname: Wong
authors.forename: R
authors.initials: R
authors.lastname: Katzman
mesh_terms: D000368:Aged; D002681:China; D003430:Cross-Sectional Studies; D003704:Dementia / Q000453:epidemiology*; D006306:Health Surveys; D006801:Humans; D008875:Middle Aged; D012107:Research Design; D013029:Space-Time Clustering