1.Willett, WC (1998) Food frequency methods. In Nutritional Epidemiology, 2nd ed., pp. 74–94. New York: Oxford University Press.
2.Cade, J, Thompson, R, Burley, V & Warm, D (2002) Development, validation and utilisation of food-frequency questionnaires – a review. Public Health Nutr 5, 567–587.
3.Frank, GC, Nicklas, TA, Webber, LS, Major, C, Miller, JF & Berenson, GS (1992) A food frequency questionnaire for adolescents: defining eating patterns. J Am Diet Assoc 92, 313–318.
4.Rockett, HR, Wolf, AM & Colditz, GA (1995) Development and reproducibility of a food frequency questionnaire to assess diets of older children and adolescents. J Am Diet Assoc 95, 336–340.
5.Rockett, HR, Breitenbach, M, Frazier, AL, Witschi, J, Wolf, AM, Field, AE & Colditz, GA (1997) Validation of a youth/adolescent food frequency questionnaire. Prev Med 26, 808–816.
6.Field, AE, Peterson, KE, Gortmaker, SL, Cheung, L, Rockett, H, Fox, MK & Colditz, GA (1999) Reproducibility and validity of a food frequency questionnaire among fourth to seventh grade inner-city school children: implications of age and day-to-day variation in dietary intake. Public Health Nutr 2, 293–300.
7.Buzzard, IM, Stanton, CA, Figueiredo, M, Fries, EA, Nicholson, R, Hogan, CJ & Danish, SJ (2001) Development and reproducibility of a brief food frequency questionnaire for assessing the fat, fiber, and fruit and vegetable intakes of rural adolescents. J Am Diet Assoc 101, 1438–1446.
8.Andersen, LF, Nes, M, Lillegaard, IT, Sandstad, B, Bjorneboe, GE & Drevon, CA (1995) Evaluation of a quantitative food frequency questionnaire used in a group of Norwegian adolescents. Eur J Clin Nutr 49, 543–554.
9.Slater, B, Philippi, ST, Fisberg, RM & Latorre, MR (2003) Validation of a semi-quantitative adolescent food frequency questionnaire applied at a public school in Sao Paulo, Brazil. Eur J Clin Nutr 57, 629–635.
10.Kusama, K, Le, DS, Hanh, TT, Takahashi, K, Hung, NT, Yoshiike, N & Yamamoto, S (2005) Reproducibility and validity of a food frequency questionnaire among Vietnamese in Ho Chi Minh City. J Am Coll Nutr 24, 466–473.
11.Willett, WC & Lenart, E (1998) Reproducibility and Validity of Food Frequency Questionnaire. Nutritional Epidemiology, 2nd ed. New York: Oxford University Press.
12.Hanh, MTT, Yoshimura, Y, Takahashi, Y, Kusama, K, Hanh, KTKN, Chuyen, VN & Yamamoto, S (2004) Eiyokun Software to Analyse Vietnamese Dietary Data. Ho Chi Minh City: Ho Chi Minh City Publishing House.
13.National Institute of Nutrition (2000) Nutritive Composition Table of Vietnamese Food. Hanoi: Medical Publishing House.
14.Nutrition Centre (2002) Composition of 400 Common Foods, 1st ed. [KTH Nguyen, HTL Tran, MTH Tran, YTP Dao, TL Tran, TN Truong, TNB Phan, AV Hoang, ND Le and TH Do, editors]. Ho Chi Minh City: Medical Publishing House.
15.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.
16.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.
17.Masson, LF, McNeill, G, Tomany, JO, Simpson, JA, Peace, HS, Wei, L, Grubb, DA & Bolton-Smith, C (2003) Statistical approaches for assessing the relative validity of a food-frequency questionnaire: use of correlation coefficients and the kappa statistic. Public Health Nutr 6, 313–321.
18.Flood, VM, Smith, WT, Webb, KL & Mitchell, P (2004) Issues in assessing the validity of nutrient data obtained from a food-frequency questionnaire: folate and vitamin B12 examples. Public Health Nutr 7, 751–756.
19.Landis, JR & Koch, GG (1977) The measurement of observer agreement for categorical data. Biometrics 33, 159–174.
20.Lietz, G, Barton, KL, Longbottom, PJ & Anderson, AS (2002) Can the EPIC food-frequency questionnaire be used in adolescent populations? Public Health Nutr 5, 783–789.
21.Montomoli, M, Gonnelli, S, Giacchi, M, Mattei, R, Cuda, C, Rossi, S & Gennari, C (2002) Validation of a food frequency questionnaire for nutritional calcium intake assessment in Italian women. Eur J Clin Nutr 56, 21–30.
22.Buzzard, IM (1998) 24-hour Dietary recall and food record methods. In Nutritional Epidemiology, 2nd ed., pp. 50–73 [WC Willett, editor]. New York: Oxford University Press.