title: Before-after paired data.
authors.affiliation: a Department of Biostatistics , University of North Carolina Gillings School of Global Public Health , Chapel Hill , North Carolina , USA.
authors.forename: Shrikant I
authors.initials: SI
authors.lastname: Bangdiwala
mesh_terms: D006801:Humans; D012107:Research Design; D018709:Statistics, Nonparametric; D014947:Wounds and Injuries / Q000453:epidemiology* / Q000517:prevention & control*