title: Reply.
authors.affiliation: Department of Veterans Affairs Long Beach Healthcare System, Long Beach, CA.|Division of Hematology/Oncology Department of Medicine, University of California, Irvine, CA.
authors.forename: Gordon D
authors.initials: GD
authors.lastname: McLaren
authors.affiliation: Southern Iron Disorders Center, Birmingham, AL.
authors.forename: James C
authors.initials: JC
authors.lastname: Barton
authors.affiliation: QIMR Berghofer Medical Research Institute, Brisbane, Australia.|Faculty of Medicine and Biomedical Sciences, University of Queensland, Brisbane, Australia.
authors.forename: Grant A
authors.initials: GA
authors.lastname: Ramm
authors.affiliation: Department of Biostatistics, University of Washington, Seattle, WA.
authors.forename: Mary J
authors.initials: MJ
authors.lastname: Emond
authors.affiliation: QIMR Berghofer Medical Research Institute, Brisbane, Australia.|Institute of Health and Biomedical Innovation School of Biomedical Sciences, Queensland University of Technology, Brisbane, Australia.
authors.forename: V Nathan
authors.identifier: 0000-0002-4583-7790
authors.initials: VN
authors.lastname: Subramaniam
authors.affiliation: Rochester General Hospital, Rochester, NY.
authors.forename: Pradyumna D
authors.initials: PD
authors.lastname: Phatak
authors.affiliation: Department of Medicine, London Health Sciences Centre, London, Ontario, Canada.
authors.forename: Paul C
authors.initials: PC
authors.lastname: Adams
authors.affiliation: QIMR Berghofer Medical Research Institute, Brisbane, Australia.|Faculty of Medicine and Biomedical Sciences, University of Queensland, Brisbane, Australia.|Royal Brisbane & Women's Hospital, Brisbane, Australia.
authors.forename: Lawrie W
authors.initials: LW
authors.lastname: Powell
authors.affiliation: Centre for MEGA Epidemiology, University of Melbourne, Melbourne, Australia.
authors.forename: Lyle C
authors.initials: LC
authors.lastname: Gurrin
authors.affiliation: QIMR Berghofer Medical Research Institute, Brisbane, Australia.|School of Medicine and School of Chemistry and Molecular Bioscience, University of Queensland, Brisbane, Australia.
authors.forename: Gregory J
authors.initials: GJ
authors.lastname: Anderson
authors.affiliation: Department of Epidemiology, University of California, Irvine, CA.
authors.forename: Christine E
authors.initials: CE
authors.lastname: McLaren