1.Feskanich, D, Rimm, EB, Giovannucci, EL, Colditz, GA, Stampfer, MJ, Litin, LB & Willett, WC (1993) Reproducibility and validity of food-intake measurements from a semiquantitative food frequency questionnaire. J Am Diet Assoc 93, 790–796.
2.Kelemen, LE, Anand, SS, Vuksan, V, Yi, QL, Teo, KK, Devanesen, S & Yusuf, S (2003) Development and evaluation of cultural food frequency questionnaires for South Asians, Chinese, and Europeans in North America. J Am Diet Assoc 103, 1178–1184.
3.Jain, M (1999) Culture specific food frequency questionnaires: development for use in a cardiovascular study. Can J Diet Pract Res 60, 27–36.
4.Shai, I, Shahar, DR, Vardi, H & Fraser, D (2004) Selection of food items for inclusion in a newly developed food-frequency questionnaire. Public Health Nutr 7, 745–749.
5.Dehghan, M, Al Hamad, N, Yusufali, A, Nusrath, F, Yusuf, S & Merchant, AT (2005) Development of a semi-quantitative food frequency questionnaire for use in United Arab Emirates and Kuwait based on local foods. Nutr J 27, issue 4, 18.
6.Gopalan, C, Sastari, R & Balasubramanian, S (1991) Food composition tables. In Nutritive Value of Indian Foods, revised ed., pp. 45–80 [BS Narasinga Rao, YG Deothale and KC Pant, editors]. Hyderabad: National Institute of Nutrition.
7.Krebs, J (2002) McCance and Widdowson’s The Composition of Foods: Summary Edition, 6th summary ed. Cambridge/London: The Royal Society of Chemistry/Food Standards Agency.
8.Willett, W (1998) Nutritional Epidemiology, 2nd ed. New York: Oxford University Press.
9.Fornes, NS, Stringhini, MLF & Elias, BM (2003) Reproducibility and validity of a food-frequency questionnaire for use among low-income Brazilian workers. Public Health Nutr 6, 821–827.
10.Rimm, EB, Giovannucci, EL, Stampfer, MJ, Colditz, GA, Litin, LB & Willett, WC (1992) Reproducibility and validity of an expanded self-administered semiquantitative food frequency questionnaire among male health-professionals. Am J Epidemiol 135, 1114–1126.
11.Merchant, AT, Dehghan, M, Chifamba, J, Terera, G & Yusuf, S (2005) Nutrient estimation from an FFQ developed for a black Zimbabwean population. Nutr J 13, issue 4, 37.
12.Shu, XO, Yang, G, Jin, F, Liu, D, Kushi, L, Wen, W, Gao, Y-T & Zheng, W (2004) Validity and reproducibility of the food frequency questionnaire used in the Shanghai Women’s Health Study. Eur J Clin Nutr 58, 17–23.
13.Stryker, WS, Salvini, S, Stampfer, MJ, Sampson, L, Colditz, GA & Willett, WC (1991) Contributions of specific foods to absolute intake and between-person variation of nutrient consumption. J Am Diet Assoc 91, 172–178.
14.Chadha, SL, Gopinath, N, Katyal, I & Shekhawat, S (1995) Dietary profile of adults in an urban & a rural community. Indian J Med Res 101, 258–267.
15.Shobana, R, Snehalatha, C, Latha, E, Vijay, V & Ramachandran, A (1998) Dietary profile of urban south Indians and its relations with glycaemic status. Diabetes Res Clin Pract 42, 181–186.
16.Hebert, JR, Gupta, PC, Bhonsle, RB, Murti, PR, Mehta, H, Verghese, F, Aghi, M, Krishnaswamy, K & Mehta, FS (1998) Development and testing of a quantitative food frequency questionnaire for use in Kerala, India. Public Health Nutr 1, 123–130.
17.Hebert, JR, Gupta, PC, Bhonsle, RB, Sinor, PN, Mehta, H & Mehta, FS (1999) Development and testing of a quantitative food frequency questionnaire for use in Gujarat, India. Public Health Nutr 2, 39–50.
18.Shahar, D, Shai, I, Vardi, H, Brener-Azrad, A & Fraser, D (2003) Development of a semi-quantitative food frequency questionnaire (FFQ) to assess dietary intake of multiethnic populations. Eur J Epidemiol 18, 855–861.
19.Noethlings, U, Hoffmann, K, Bergmann, MM & Boeing, H (2003) Portion size adds limited information on variance in food intake of participants in the EPIC–Potsdam study. J Nutr 133, 510–515.
20.Tjonneland, A, Haraldsdottir, J, Overvad, K, Stripp, C, Ewertz, M & Jensen, OM (1992) Influence of individually estimated portion size data on the validity of a semi-quantitative food frequency questionnaire. Int J Epidemiol 21, 770–777.
21.Martin-Moreno, JM, Boyle, P, Gorgojo, L, Maisonneuve, P, Fernandez-Rodriguez, JC, Salvini, S & Willett, WC (1993) Development and validation of a food frequency questionnaire in Spain. Int J Epidemiol 22, 512–519.
22.Willett, WC, Sampson, L, Stampfer, MJ, Rosner, B, Bain, C, Witschi, J, Hennekens, CH & Speizer, FE (1985) Reproducibility and validity of a semi quantitative food frequency questionnaire. Am J Epidemiol 122, 51–65.
23. Toft U, Kristoffersen L, Ladelund S, Bysted A, Jakobsen J, Lau C, Jørgensen T, Borch-Johnsen K & Ovesen L (2007) Relative validity of a food frequency questionnaire used in the Inter99 study. Eur J Clin Nutr (Epublication ahead of print version).
24.Shatenstein, B, Nadon, S, Godin, C & Ferland, G (2005) Development and validation of a food frequency questionnaire. Can J Diet Pract Res 66, 67–75.
25.Chen, Y, Ahsan, H, Parvez, F & Howe, GR (2004) Validity of a food-frequency questionnaire for a large prospective cohort study in Bangladesh. Br J Nutr 92, 851–859.
26.Pandey, D, Bhatia, V, Boddula, R, Singh, HK & Bhatia, E (2005) Validation and reproducibility of a food frequency questionnaire to assess energy and fat intake in affluent north Indians. Natl Med J India 18, 230–235.
27.Sevak, L, Mangtani, P, McCormack, V, Bhakta, D, Kassam-Khamis, T & Silva, ID (2004) Validation of a food frequency questionnaire to assess macro- and micro-nutrient intake among South Asians in the United Kingdom. Eur J Nutr 43, 160–168.