Validation of estimates of energy intake by weighed dietary record and diet history in children and adolescents. - Livingstone,M.B.; Prentice,A.M.; Coward,W.A.; Strain,J.J.; Black,A.E.; Davies,P.S.; Stewart,C.M.; McKenna,P.G.; Whitehead,R.G. (Am J Clin Nutr, 1992)