1. San Antonio Endovascular & Heart Institute; San Antonio Texas USA
2. Norwalk Hospital; Yale School of Medicine; Norwalk Connecticut USA
3. University of Texas Health Science Center; San Antonio Texas USA
4. Medical University of Silesia; Katowice Poland
5. American Heart of Poland; Katowice Poland
6. Medical University of Silesia; Zabrze Poland
7. Thomas Jefferson University; Philadelphia Pennsylvania USA
8. Kidney Specialists; San Antonio Texas USA