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