Lithell , H., Weiner , E., Vessby , B. and Johansson , E. D. B. (1983) “Effects of Continuous Levonorgestrel Treatment (Subcutaneous Capsules) on the Lipoprotein and Carbohydrate Metabolism in Fertile Women”, Upsala Journal of Medical Sciences, 88(2), pp. 103-108. doi: 10.3109/03009738309178443.