- Fewer reoperations and shorter stay in the cardiac surgical ward when stabilising the sternum with the Ley prosthesis in post-operative mediastinitis. Astudillo, R., Vaage, J., Myhre, U., Karevold, A., Gårdlund, B. European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery. (2001)