Geographical variation in nutrient intake between urban and rural areas of Jiangsu province, China and development of a semi-quantitative food frequency questionnaire for middle-aged inhabitants

Wang Y-M, Mo B-Q, Takezaki T, Imaeda N, Kimura M, Wang X-R, Tajima K. Geographical variation in nutrient intake between urban and rural areas of Jiangsu province, China and development of a semi-quantitative food frequency questionnaire for middle-aged inhabitants. J Epidemiol. 2003; 13(2): 80–9.