Larsen, L. F., Andersen, H. R., Hansen, A. B., & Andersen, O. (1996). Variation in risk indicators of cardiovascular disease during the menstrual cycle: an investigation of within-subject variations in glutathione peroxidase, haemostatic variables, lipids and lipoproteins in healthy young women. Scandinavian Journal of Clinical & Laboratory Investigation, 56, 241-249.