title: Reply to R Schiffmann.
authors.affiliation: From the Department of Internal Medicine, Baylor University Medical Center, Dallas, TX (e-mail: johnfo@baylorhealth.edu).
authors.forename: Andrea L
authors.initials: AL
authors.lastname: Betesh
authors.affiliation: From the Department of Internal Medicine, Baylor University Medical Center, Dallas, TX (e-mail: johnfo@baylorhealth.edu).
authors.forename: Carol A
authors.initials: CA
authors.lastname: Santa Ana
authors.affiliation: From the Department of Internal Medicine, Baylor University Medical Center, Dallas, TX (e-mail: johnfo@baylorhealth.edu).
authors.forename: Jason A
authors.initials: JA
authors.lastname: Cole
authors.affiliation: From the Department of Internal Medicine, Baylor University Medical Center, Dallas, TX (e-mail: johnfo@baylorhealth.edu).
authors.forename: John S
authors.initials: JS
authors.lastname: Fordtran
mesh_terms: D000126:Achlorhydria / Q000097:blood*; D018798:Anemia, Iron-Deficiency / Q000097:blood*; D006801:Humans