[1] Holick, M.F. and Chen, T.C. (2008) Vitamin D Deficiency: A Worldwide Problem with Health Consequences. The American Journal of Clinical Nutrition, 87, 1080S-1086S.
[2] Al Attia, H.M. and Ibrahim, M.A. (2012) The High Prevalence of Vitamin D Inadequacy and Dress Style of Women in the Sunny UAE. Archives of Osteoporosis, 7, 307-310.
http://dx.doi.org/10.1007/s11657-012-0104-1
[3] Al Anouti, F., Thomas, J., Abdel-Wareth, L., et al. (2011) Vitamin D Deficiency and Sun Avoidance among University Students at Abu Dhabi, United Arab Emirates. Dermato-Endocrinology, 3, 235-239.
http://dx.doi.org/10.4161/derm.3.4.16881
[4] Heaney, R.P. (2005) Vitamin D Requirement in Health and Disease. The Journal of Steroid Biochemistry and Molecular Biology, 97, 13-19.
http://dx.doi.org/10.1016/j.jsbmb.2005.06.020
[5] Pittas, A.G., Lau, J., Hu, F.B. and Hughes, D.B. (2007) The Role of Vitamin D and Calcium in Type 2 Diabetes. A Systematic Review and Meta-Analysis. The Journal of Clinical Endocrinology and Metabolism, 92, 2017-2029.
http://dx.doi.org/10.1210/jc.2007-0298
[6] Cade, J., Thomson, R., Burley, V. and Warm, D. (2002) Development, Validation and Utilization of Food Frequency Questionnaire—A Review. Public Health Nutrition, 5, 567-587.
http://dx.doi.org/10.1079/PHN2001318
[7] Misra, M., Tsai, P., Anderson, E.J., et al. (2006) Nutrient Intake in Community-Dwelling Adolescent Girls with Anorexia Nervosa and in Healthy Adolescents. The American Journal of Clinical Nutrition, 84, 698-706.
[8] Quandt, S.A., Vitolins, M.S. and Smith, S.L. (2007) Comparative Validation of Standard, Picture-Sort and Meal-Based Food-Frequency Questionnaires Adapted for an Elderly Population of Low Socio-Economic Status. Public Health Nutrition, 10, 524-32.
[9] Taylor, C., Lamparello, B. and Kruczek, K. (2009) Validation of a Food Frequency Questionnaire for Determining Calcium and Vitamin D Intake by Adolescent Girls with Anorexia Nervosa. Journal of the American Dietetic Association, 109, 479-485.
http://dx.doi.org/10.1016/j.jada.2008.11.025
[10] Yang, M., Wang, Y. and Davis, C.G. (2014) Validation of an FFQ to Assess Short-Term Antioxidant Intake against 30 d Food Records and Plasma Biomarkers. Public Health Nutrition, 17, 297-306.
http://dx.doi.org/10.1017/S1368980012005071
[11] Pritchard, J.M., Seechurn, T. and Atkinson, A. (2010) A Food Frequency Questionnaire for the Assessment of Calcium, Vitamin D and Vitamin K: A Pilot Validation Study. Nutrients, 2, 805-819.
http://dx.doi.org/10.3390/nu2080805
[12] Institute of Medicine Food and Nutrition Board (1997) Dietary Reference Intakes: Calcium, Magnesium, Phosphorus, Vitamin D and Fluoride. National Academy Press, Institute of Medicine, Food and Nutrition Board, Washing DC.
[13] Tayyem, R.F., Abu-Mweis, S.S., Bawadi, H.A., Agraib, L. and Bani-Hani, K. (2014) Validation of a Food Frequency Questionnaire to Assess Macronutrient and Micronutrient Intake among Jordanians. Journal of the Academy of Nutrition and Dietetics, 114, 1046-1052.
http://dx.doi.org/10.1016/j.jand.2013.08.019
[14] Hacker-Thompson, A., Schloetter, M. and Sellmeyer, D.E. (2012) Validation of a Dietary Vitamin D Questionnaire Using Multiple Diet Records and the Block 98 Health Habits and History Questionnaire in Healthy Postmenopausal Women in Northern California. Journal of the Academy of Nutrition and Dietetics, 112, 419-423.
http://dx.doi.org/10.1016/j.jada.2011.08.043
[15] Montomoli, M., Gonnelli, S. and Giacchi, M., (2002) Validation of a Food Frequency Questionnaire for Nutritional Calcium Intake Assessment in Italian Women. European Journal of Clinical Nutrition, 56, 21-30.
http://dx.doi.org/10.1038/sj.ejcn.1601278
[16] Serra-Majem, L., Frost Andersen, L., Henríque-Sánchez, P., et al. (2009) Evaluating the Quality of Dietary Intake Validation Studies. British Journal of Nutrition, 102, S3-S9.
http://dx.doi.org/10.1017/S0007114509993114
[17] Chee, W.S., Suriah, A.R., Zaitun, Y., et al. (2002) Dietary Calcium Intake in Postmenopausal Malaysian Women: Comparison between the Food Frequency Questionnaire and Three-Day Food Records. Asia Pacific Journal of Clinical Nutrition, 11, 142-146.
http://dx.doi.org/10.1046/j.1440-6047.2002.00276.x