Validation of dietary intakes measured by diet history against 24 h urinary nitrogen excretion and energy expenditure measured by the doubly-labelled water method in middle-aged women.
Black AE, Welch AA, and Bingham SA
The British journal of nutrition. Jun 2000
(DOI : 10.1017/s0007114500000441)
Validation of weighed records and other methods of dietary assessment using the 24 h urine nitrogen technique and other biological markers.
Bingham SA, Cassidy A, Cole TJ, Welch A, Runswick SA, Black AE, Thurnham D, Bates C, Khaw KT, and Key TJ
The British journal of nutrition. Apr 1995
(DOI : 10.1079/bjn19950057)