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American Academy of Pediatrics (1997): Breast-feeding and the use of human milk. Pediatrics 100, 1035–9

Axelsson I, Gebre-Medhin M, Hernell O, Jakobsson I, Michaelsen KF , Samuelson G (1999): The AD-drops can be replaced by D-drops [in Swedish]. Lakartidningen 96, 2200-2204.

Department of Health (1998): Committee of Medical Aspects of Food Policy: Nutrition and Bone Health - With particular reference to calcium and vitamin D. Report no. 49. London: HM Stationary Office.

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Health Council of the Netherlands (2000): Dietary references values: Calcium, Vitamin D, Thiamin, Riboflavin, Niacin, Pantothenic Acid and Biotin, Publication no. 2000/12. The Hague, The Netherlands: Health Council of the Netherlands.

Hill et al (in press): Seasonal variation in vitamin D status and bone turnover in Irish postmenopausal women. IJVNR

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Kennedy A (2006): Our Lady's Hospital for Sick Children, Crumlin, Dublin. Ref Type: Personal Communication.

National Nutrition Council (1999): Finnish Nutrition Recommendations, pp. 24. Helsinki, Finland: Ministry of Agriculture and Forestry.

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Cork Centre for Vitamin D and Nutrition Research

University College Cork , Western Road, Cork