title: Introduction: first things first.
authors.affiliation: Department of Epidemiology and Biostatistics, Case Western Reserve University, MetroHealth Medical Center, 2500 MetroHealth Dr., Cleveland, Ohio 44109, USA.
authors.forename: A H
authors.initials: AH
authors.lastname: Schnell
mesh_terms: D002874:Chromosome Mapping / Q000706:statistics & numerical data*; D003625:Data Collection / Q000706:statistics & numerical data; D005828:Genetics, Population; D006801:Humans; D008957:Models, Genetic; D015203:Reproducibility of Results