1. Cardiology Department, Na Homolce Hospital; Prague Czech Republic
2. Heart Center, University of Leipzig; Germany
3. School of Medicine; University of Pennsylvania; Philadephia Pennsylvania USA
4. University of California San Francisco; California USA
5. Indiana University Health; Bloomington Indiana USA
6. Stereotaxis, Inc; St. Louis MO USA
7. Mount Sinai Medical Center; New York New York USA