required or not, it is entirely safe and Relation of intake of sugar in solid foods to dental There is another vital but experimental caries in children aged 15-18 years thoroughly effective. requirement in laboratory computing; this is RICHARD HARDY the initial commitment by the designers to Boys Girls make and deliver systems which can be used Accident and Emergency Department, General Hospital, by laboratories without specialist computer No .89 44 Hereford Mean DMF index of high knowledge. This implies a coherent policy at . . consumers* 11-8 15 9 1 Hardy, R H, Accidents and Emergencies, 2nd edn. Mean DMF index of low least at regional level, with common equipmentLondon, Oxford University Press, 1978. . consumers* . .90 12 5 purchasing and programming support. Only 0 24 Correlation coefficient (r) 0-25 in this way can we avoid putting computer ..