title: Clustered data.
authors.affiliation: Department of Biostatistics, Harvard School of Public Health, Boston, Massachusetts 02115, USA. fitzmaur@hsph.harvard.edu
authors.forename: G
authors.initials: G
authors.lastname: Fitzmaurice
mesh_terms: D016000:Cluster Analysis; D003627:Data Interpretation, Statistical; D016021:Epidemiologic Studies; D006801:Humans; D016008:Statistical Distributions