title: Response to the letter by Sugiyama and Oda.
authors.affiliation: Department of Paediatric Endocrinology (M.Z.M.), Royal Manchester Children's Hospital, Manchester, United Kingdom; College of Medicine (T.D.T.), Mayo Clinic, Rochester, Minnesota; Ethel Austin Martin Program (B.L.S.), South Dakota State University, Brookings, South Dakota; Department of Endocrinology and Diabetes (N.J.S., W.H.), Birmingham Children's Hospital, Birmingham, United Kingdom; Vitamin D Research Group (M.K.), School of Food and Nutritional Sciences, and Irish Centre for Fetal and Neonatal Translational Research, University College Cork, Cork, Ireland; Department of Endocrinology and Diabetes (C.F.M.), The Children's Hospital at Westmead, Sydney, Australia; and Institute of Metabolism and Systems Research (W.H.), University of Birmingham, Birmingham, United Kingdom.
authors.forename: M Z
authors.initials: MZ
authors.lastname: Mughal
authors.affiliation: Department of Paediatric Endocrinology (M.Z.M.), Royal Manchester Children's Hospital, Manchester, United Kingdom; College of Medicine (T.D.T.), Mayo Clinic, Rochester, Minnesota; Ethel Austin Martin Program (B.L.S.), South Dakota State University, Brookings, South Dakota; Department of Endocrinology and Diabetes (N.J.S., W.H.), Birmingham Children's Hospital, Birmingham, United Kingdom; Vitamin D Research Group (M.K.), School of Food and Nutritional Sciences, and Irish Centre for Fetal and Neonatal Translational Research, University College Cork, Cork, Ireland; Department of Endocrinology and Diabetes (C.F.M.), The Children's Hospital at Westmead, Sydney, Australia; and Institute of Metabolism and Systems Research (W.H.), University of Birmingham, Birmingham, United Kingdom.
authors.forename: T D
authors.initials: TD
authors.lastname: Thacher
authors.affiliation: Department of Paediatric Endocrinology (M.Z.M.), Royal Manchester Children's Hospital, Manchester, United Kingdom; College of Medicine (T.D.T.), Mayo Clinic, Rochester, Minnesota; Ethel Austin Martin Program (B.L.S.), South Dakota State University, Brookings, South Dakota; Department of Endocrinology and Diabetes (N.J.S., W.H.), Birmingham Children's Hospital, Birmingham, United Kingdom; Vitamin D Research Group (M.K.), School of Food and Nutritional Sciences, and Irish Centre for Fetal and Neonatal Translational Research, University College Cork, Cork, Ireland; Department of Endocrinology and Diabetes (C.F.M.), The Children's Hospital at Westmead, Sydney, Australia; and Institute of Metabolism and Systems Research (W.H.), University of Birmingham, Birmingham, United Kingdom.
authors.forename: B L
authors.initials: BL
authors.lastname: Specker
authors.affiliation: Department of Paediatric Endocrinology (M.Z.M.), Royal Manchester Children's Hospital, Manchester, United Kingdom; College of Medicine (T.D.T.), Mayo Clinic, Rochester, Minnesota; Ethel Austin Martin Program (B.L.S.), South Dakota State University, Brookings, South Dakota; Department of Endocrinology and Diabetes (N.J.S., W.H.), Birmingham Children's Hospital, Birmingham, United Kingdom; Vitamin D Research Group (M.K.), School of Food and Nutritional Sciences, and Irish Centre for Fetal and Neonatal Translational Research, University College Cork, Cork, Ireland; Department of Endocrinology and Diabetes (C.F.M.), The Children's Hospital at Westmead, Sydney, Australia; and Institute of Metabolism and Systems Research (W.H.), University of Birmingham, Birmingham, United Kingdom.
authors.forename: N J
authors.initials: NJ
authors.lastname: Shaw
authors.affiliation: Department of Paediatric Endocrinology (M.Z.M.), Royal Manchester Children's Hospital, Manchester, United Kingdom; College of Medicine (T.D.T.), Mayo Clinic, Rochester, Minnesota; Ethel Austin Martin Program (B.L.S.), South Dakota State University, Brookings, South Dakota; Department of Endocrinology and Diabetes (N.J.S., W.H.), Birmingham Children's Hospital, Birmingham, United Kingdom; Vitamin D Research Group (M.K.), School of Food and Nutritional Sciences, and Irish Centre for Fetal and Neonatal Translational Research, University College Cork, Cork, Ireland; Department of Endocrinology and Diabetes (C.F.M.), The Children's Hospital at Westmead, Sydney, Australia; and Institute of Metabolism and Systems Research (W.H.), University of Birmingham, Birmingham, United Kingdom.
authors.forename: M
authors.initials: M
authors.lastname: Kiely
authors.affiliation: Department of Paediatric Endocrinology (M.Z.M.), Royal Manchester Children's Hospital, Manchester, United Kingdom; College of Medicine (T.D.T.), Mayo Clinic, Rochester, Minnesota; Ethel Austin Martin Program (B.L.S.), South Dakota State University, Brookings, South Dakota; Department of Endocrinology and Diabetes (N.J.S., W.H.), Birmingham Children's Hospital, Birmingham, United Kingdom; Vitamin D Research Group (M.K.), School of Food and Nutritional Sciences, and Irish Centre for Fetal and Neonatal Translational Research, University College Cork, Cork, Ireland; Department of Endocrinology and Diabetes (C.F.M.), The Children's Hospital at Westmead, Sydney, Australia; and Institute of Metabolism and Systems Research (W.H.), University of Birmingham, Birmingham, United Kingdom.
authors.forename: C F
authors.initials: CF
authors.lastname: Munns
authors.affiliation: Department of Paediatric Endocrinology (M.Z.M.), Royal Manchester Children's Hospital, Manchester, United Kingdom; College of Medicine (T.D.T.), Mayo Clinic, Rochester, Minnesota; Ethel Austin Martin Program (B.L.S.), South Dakota State University, Brookings, South Dakota; Department of Endocrinology and Diabetes (N.J.S., W.H.), Birmingham Children's Hospital, Birmingham, United Kingdom; Vitamin D Research Group (M.K.), School of Food and Nutritional Sciences, and Irish Centre for Fetal and Neonatal Translational Research, University College Cork, Cork, Ireland; Department of Endocrinology and Diabetes (C.F.M.), The Children's Hospital at Westmead, Sydney, Australia; and Institute of Metabolism and Systems Research (W.H.), University of Birmingham, Birmingham, United Kingdom.
authors.forename: W
authors.initials: W
authors.lastname: Högler