title: Methods for calculation of follow-up rate in a cohort study.
authors.forename: R
authors.initials: R
authors.lastname: Chen
authors.forename: L
authors.initials: L
authors.lastname: Wei
authors.forename: H
authors.initials: H
authors.lastname: Huang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D015331:Cohort Studies; D003300:Copper; D004812:Epidemiologic Methods; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D008906:Mining
chemical_list: D003300:Copper