IGF1 and hyperinsulinemic hypoglycemia, familial, 4: A PubMed research for MEDLINE filtered for pediatric age (0–18 year-old subjects) was undertaken by using the following terms as key words: “Vitamin D” and “Growth”, “Growth Hormone” or “GH”, “Insulin-like Growth Factor-1” or “IGF-1”, and “Growth Hormone Deficiency” or “GHD”.