1Cook, DG, Carey, IM, Whincup, PH, Papacosta, O, Chirico, S, Bruckdorfer, KR, et al. . Effect of fresh fruit consumption on lung function and wheeze in children. Thorax 1997; 52: 628–33.
2Butland, BK, Fehily, AF, Elwood, PC. Diet, lung function, and lung function decline in a cohort of 2512 middle aged men. Thorax 2000; 55: 102–8.
3Appel, LJ, Moore, TJ, Obarzanek, E, Vollmer, WM, Svetkey, LP, Sacks, FM, et al. . A clinical trial of the effects of dietary patterns on blood pressure. New England Journal of Medicine 1997; 336: 1117–24.
4Ness, AR, Powles, JW. Fruit and vegetables, and cardiovascular disease: a review. International Journal of Epidemiology 1997; 26: 1–13.
5Feldman, EB. Fruit and vegetables and the risk of stroke. Nutrition Reviews 2001; 59: 24–7.
6World Cancer Research Fund, American Institute for Cancer Research. Food, Nutrition, and the Prevention of Cancer: A Global Perspective. Washington, DC: American Institute for Cancer Research, 1997.
7Williams, C. Healthy eating: clarifying advice about fruit and vegetables. British Medical Journal 1995; 310: 1453–5.
8Henderson, L, Gregory, J, Swan, G. The National Diet and Nutrition Survey: Adults Aged 19 to 64 Years. Vol. 1: Types and Quantities of Foods Consumed. London: The Stationery Office, 2002.
9Billson, H, Pryer, JA, Nichols, R. Variation in fruit and vegetable consumption among adults in Britain. An analysis from the dietary and nutrition survey of British adults. European Journal of Clinical Nutrition 1999; 53: 946–52.
10Monaghan, S. An Atlas of Health Inequalities Between Welsh Local Authorities. Cardiff: Bro Taf Health Authority, 1998.
11Barker, DJP, Eriksson, JG, Forsén, T, Osmond, C. Fetal origins of adult disease: strength of effects and biological basis. International Journal of Epidemiology 2002; 31: 1235–9.
12Burr, ML, Elwood, PC, Hole, DJ, Hurley, RJ, Hughes, RE. Plasma and leukocyte ascorbic acid levels in the elderly. American Journal of Clinical Nutrition 1974; 27: 144–51.
13Burr, ML, Samloff, IM, Bates, CJ, Holliday, RM. Atrophic gastritis and vitamin C status in two towns with different stomach cancer death-rates. British Journal of Cancer 1987; 56: 163–7.
14Newcombe, RG. Improved confidence intervals for the difference between binomial proportions based on paired data. Statistics in Medicine 1998; 17: 2635–50.
15Krapf, FE. LaborDatenBuch. Munich: Urban and Schwarzenberg, 1995.
16Mathews, F, Yudkin, P, Neil, A. Influence of maternal nutrition on outcome of pregnancy: prospective cohort study. British Medical Journal 1999; 319: 339–43.
17Haste, FM, Brooke, OG, Anderson, HR, Bland, JM, Griffin, J, Peacock, JL. Nutrient intakes during pregnancy: observations on the influence of smoking and social class. American Journal of Clinical Nutrition 1990; 51: 29–36.
18Serdula, M, Coates, R, Byers, T, Mokdad, A, Jewell, S, Chávez, N, et al. . Evaluation of a brief telephone questionnaire to estimate fruit and vegetable consumption in diverse study populations. Epidemiology 1993; 4: 455–63.
19Ashfield-Watt, PAL, Welch, AA, Day, NE, Bingham, SA. Is ‘five-a-day’ an effective way of increasing fruit and vegetable intakes? Public Health Nutrition 2003; 7: 257–61.
20Steptoe, A, Perkins-Porras, L, Rink, E, Hilton, S, Cappucio, FP. Behavioural counselling to increase consumption of fruit and vegetables in low income adults: randomised trial. British Medical Journal. 2003; 326: 855–8.
21Department of Health. Our Healthier Nation: A Contract for Health. London: The Stationery Office, 1998.
22Mulliner, CM, Spiby, H, Fraser, RB. A study exploring midwives' education in, knowledge of and attitudes to nutrition in pregnancy. Midwifery 1995; 11: 37–41.
23Young, F, Nielsen, SE, Haraldsdóttir, J, Danshvar, B, Lauridsen, ST, Knuthsen, P, et al. . Effect of fruit juice on urinary quercetin excretion and biomarkers of antioxidative status. American Journal of Clinical Nutrition 1999; 69: 87–94.
24Bub, A, Watzl, B, Blockhaus, M, Brivida, K, Liegibel, U, Müller, H, et al. . Fruit juice consumption modulates antioxidative status, immune status and DNA damage. Journal of Nutritional Biochemistry 2003; 14: 90–8.
25Sánchez-Moreno, C, Cano, MP, de Ancos, B, Olmedilla, B, Granado, F, Martín, A. Effect of orange juice intake on vitamin C concentrations and biomarkers of antioxidant status in humans. American Journal of Clinical Nutrition 2003; 78: 454–60.
26Harats, D, Chevion, S, Nahir, M, Norman, Y, Sagee, O, Berry, E. Citrus fruit supplementation reduces lipoprotein oxidation in young men ingesting a diet high in saturated fat: presumptive evidence for an interaction between vitamins C and E in vivo. American Journal of Clinical Nutrition 1998; 67: 240–5.
27Kurowska, EM, Spence, D, Jordan, J, Wetmore, S, Freeman, DJ, Piché, LA, et al. . HDL-cholesterol-raising effect of orange juice in subjects with hypercholesterolemia. American Journal of Clinical Nutrition 2000; 72: 1095–100.
28Treiman, K, Freimuth, V, Damron, D, Lasswell, A, Anliker, J, Havas, S, et al. . Attitudes and behaviors related to fruits and vegetables among low-income women in the WIC Program. Journal of Nutrition Education 1996; 28: 149–56.
29Anderson, AS, Cox, DN, McKellar, S, Reynolds, J, Lean, MEJ, Mela, DJ. Take Five, a nutrition education intervention to increase fruit and vegetable intakes: impact on attitudes towards dietary change. British Journal of Nutrition 1998; 80: 133–40.
30Taylor, CA, Hampl, JS, Johnston, CSW. Low intakes of vegetables and fruits, especially citrus fruits, lead to inadequate vitamin C intakes among adults. European Journal of Clinical Nutrition 2000; 54: 573–8.
31Anderson, JV, Bybee, DI, Brown, RM, McLean, DF, Garcia, EM, Breer, L, et al. . Five A Day fruit and vegetable intervention improves consumption in a low income group. Journal of the American Dietetic Association 2001; 101: 195–202.
32Zino, S, Skeaff, M, Williams, S, Mann, J. Randomised controlled trial of effect of fruit and vegetable consumption on plasma concentrations of lipids and antioxidants. British Medical Journal 1997; 314: 1787–91.
33Broeksmans, WMR, Klöpping-Ketelaars, IAA, Schuurman, CRWC, Verhagen, H, van den Berg, H, Kok, F, et al. . Fruits and vegetables increase plasma carotenoids and vitamins and decrease homocysteine in humans. Journal of Nutrition 2000; 130: 1578–83.
34Block, G, Norkus, E, Hudes, M, Mandel, S, Helzlsouer, K. Which plasma antioxidants are most related to fruit and vegetable consumption? American Journal of Epidemiology 2001; 154: 1113–8.