Low vitamin D concentrations found in study of Asian children was not function of analytical method

doi:10.1136/bmj.319.7204.254a

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Margaret Lawson, Senior lecturer in paediatric nutrition

Childhood Nutrition Research Centre, Institute of Child Health, London WC1N 1EH

EDITOR—I would like to respond to the two letters1 commenting on the short report that Thomas and I wrote on vitamin D concentrations in Asian children.2 The diagnosis of rickets in a white infant associated with the use of a potent sunscreen that Zlotkin reports is interesting. …