We have two new risks for atrial fibrillation and an intriguing study on the duration of anticoagulation after bioprosthetic aortic valve. So first up is a study from the women's health initiative that, as we know, randomized women to receive estrogen, with or without progesterone, depending on whether they did or did not have had a hysterectomy. And this analysis looked over about a six-year follow-up period. To see the incidence of new atrial fibrillation that they found was modestly increased by about twelve percent overall, and this sum is a new finding, combined with other risks that have previously been seen of pulmonary, embolism, VTE and indeed cardiovascular events and so another factor to consider. When thinking about estrogen replacement therapy, next up is a study from the Framingham risk study looking at low magnesium, that was also seen to be a risk factor for incidence of atrial fibrillation looking at the lowest quartile. That is less than one point: s...