Maternal Serum Levels of 25-Hydroxy-Vitamin D During Pregnancy and Risk of Type 1 Diabetes in the Offspring
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Smoothed average serum levels of 25-OH D versus season of blood collection in pregnant women whose child later developed type
1 diabetes (case subjects, solid line) and control subjects (dotted line). Smoothing was conducted using kernel-weighted local
polynomial regression in Stata version 11.