Table 1.

Recommended Supplementation for VD Insufficiency/Deficiency for Infants, Children, and Adolescents (Used for Cohort 1)

Serum 25-Hydroxy VD Level Pre-HSCT (Baseline), ng/mL*	Cholecalciferol (Vitamin D3) Dose Prescribed at the Start of HSCT
16–30	2000 IU/d orally or enterally (or 50,000 IU every 4 wk)
5–15	4000 IU/d orally or enterally (or 50,000 IU every other wk) for 12 wk
<5	8000 IU/d orally or enterally (or 50,000 IU/wk) for 4 wk, then 4000 IU/d (or 50,000 IU/twice per mo) for 2 mo

^*Adopted from National Kidney Foundation guidelines.