BACKGROUND Intravascular brachytherapy is being applied more and more in patients with coronary artery disease for the prevention of restenosis subsequent to balloon angioplasty, in particular after stent implantation. Several radiation sources (beta- and gamma-emitters) are available in clinical routine. It was the purpose of this study to compare the radiation doses at the level of the advent...

The Israeli Kibbutz movement is a voluntary cooperative based on equality, mutual assistance, partnership, and common ownership of property. It is one of the last socialist experiments that successfully survived for most of the twentieth century. How did a voluntary egalitarian institution exist in a more capitalist environment? What level of equality can be sustained as an equilibrium? I study...