title: In reply.
authors.forename: Matthew T
authors.initials: MT
authors.lastname: Olson
authors.forename: William
authors.initials: W
authors.lastname: Clarke
mesh_terms: D019963:Clinical Chemistry Tests / Q000592:standards*; D016903:Drug Monitoring / Q000592:standards*; D006801:Humans; D009661:Nortriptyline / Q000097:blood*
chemical_list: D009661:Nortriptyline