Paediatricsmiddle twist
A 14-month-old girl who is still breastfed and has had no supplements is referred because she is not yet walking and her legs look bowed. Her mother has dark skin and covers her head and arms outdoors. The wrists are widened and there is beading along the costochondral junctions. Serum 25-hydroxyvitamin D is 11 nmol/L (sufficient 50 or more), corrected calcium 2.05 mmol/L (2.20-2.65) and alkaline phosphatase 780 U/L (less than 350). Which one of the following treatment regimens is most appropriate for her?