title: Editorial comment.
authors.affiliation: Professor of Medicine, Epidemiology and Biostatistics, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Chairman, Department of Quantitative Health Sciences, Cleveland, Ohio.
authors.forename: Michael W
authors.initials: MW
authors.lastname: Kattan
mesh_terms: D062609:Electronic Nose; D006801:Humans; D008297:Male; D011470:Prostatic Hyperplasia / Q000175:diagnosis*; D011471:Prostatic Neoplasms / Q000175:diagnosis*