The paper by Darby and others published March 14th 2013 in the New England Journal of Medicine has caused a firestorm of media coverage. The authors report on over 900 women who had been treated for breast cancer in Scandinavia who suffered a major coronary event and compared them with over twelve hundred control individuals. The Swedish women were treated between 1958 and 2001, the Danish women 1977 to 2000. The authors concluded that the risk…