Validation of photographic food records in children: are pictures really worth a thousand words?
Higgins JA, LaSalle AL, Zhaoxing P, Kasten MY, Bing KN, Ridzon SE, Witten TL. Validation of photographic food records in children: are pictures really worth a thousand words? Eur J Clin Nutr. 2009 Aug; 63(8):1025-33.