Comparison of dietary assessment methods in nutritional epidemiology: weighed records v. 24 h recalls, food - frequency questionaires and estimated-diet records. - Bingham,S.; Gill,C.; Welch,A.; Day,K.; Cassidy,A.; Khaw,K.T.; Sneyd,M.J.; Key,T.JA.; Roe,L.; Day,N.E. (Br J Nutr, 1994)