title: Critical commentary.
authors.affiliation: Laboratory Medicine and Pathology, Mayo Clinic Scottsdale, Arizona 85259, USA.
authors.forename: T V
authors.initials: TV
authors.lastname: Colby
authors.forename: J G
authors.initials: JG
authors.lastname: Strickler
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology*