Response to the Letter by Pauwels, et al.
Division of Endocrinology and Diabetes (C.P.H., S.S., M.A.L.), The Children's Hospital of Philadelphia, and Department of Pediatrics (M.A.L.), Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104; National Children's Research Centre (C.P.H.), Dublin 12, Ireland; and Department of Laboratory Medicine and Pathology (R.S.), The Mayo Clinic, Rochester, Minnesota 55905.
C P
CP
Hawkes
Division of Endocrinology and Diabetes (C.P.H., S.S., M.A.L.), The Children's Hospital of Philadelphia, and Department of Pediatrics (M.A.L.), Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104; National Children's Research Centre (C.P.H.), Dublin 12, Ireland; and Department of Laboratory Medicine and Pathology (R.S.), The Mayo Clinic, Rochester, Minnesota 55905.
S
S
Schnellbacher
Division of Endocrinology and Diabetes (C.P.H., S.S., M.A.L.), The Children's Hospital of Philadelphia, and Department of Pediatrics (M.A.L.), Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104; National Children's Research Centre (C.P.H.), Dublin 12, Ireland; and Department of Laboratory Medicine and Pathology (R.S.), The Mayo Clinic, Rochester, Minnesota 55905.
R
R
Singh
Division of Endocrinology and Diabetes (C.P.H., S.S., M.A.L.), The Children's Hospital of Philadelphia, and Department of Pediatrics (M.A.L.), Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104; National Children's Research Centre (C.P.H.), Dublin 12, Ireland; and Department of Laboratory Medicine and Pathology (R.S.), The Mayo Clinic, Rochester, Minnesota 55905.
M A
MA
Levine
D003940:Diagnostic Techniques, Endocrine / Q000592:standards*; D005260:Female; D006801:Humans; D008297:Male; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000633:toxicity*
D014807:Vitamin D