| http://www.w3.org/ns/prov#value | - It is well known that severe vitamin D deficiency causes rickets but less severe vitamin D deficiency (vitamin D levels of 10-30 ng/mL) is emerging as a risk factor for a number of acute and chronic illnesses including asthma and allergies in children.1- 12 Understanding modifiable determinants of vitamin D status in early childhood is of practical importance to dietitians, physicians, and parents
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