title: The multilevel diagram.
authors.affiliation: Department of Biostatistics, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC, USA. kant@unc.edu
authors.forename: Shrikant I
authors.initials: SI
authors.lastname: Bangdiwala
mesh_terms: D000056:Accident Prevention; D003627:Data Interpretation, Statistical; D006293:Health Promotion; D006801:Humans; D008962:Models, Theoretical; D012494:Sampling Studies