“…Most of these studies defined VDD as 25(OH)D level <50 nmol/l (3)(4)(5) . Among them, only a few studies also studied clinical signs suggestive of VDD (such as rachitic rosary, frontal bossing, Harrison's sulcus, wrist widening, wide anterior fontanelle, double malleolus, craniotabes and bowing of the legs) (4,5) . Tiwari and Puliyel (2) demonstrated that the prevalence of 25(OH)D level <35 nmol/l was 84 % in slum children from three areas in Delhi.…”