Berglund , L., Berne , C., Svärdsudd , K., Garmo , H., Melhus , H. and Zethelius , B. (2011) “Seasonal variations of insulin sensitivity from a euglycemic insulin clamp in elderly men”, Upsala Journal of Medical Sciences, 117(1), pp. 35-40. doi: 10.3109/03009734.2011.628422.