1. University of Rochester School of Medicine & Dentistry, Heart Research Follow-up Program, Rochester, New York
2. E. Meshalkin National Medical Research Center, Novosibirsk, Russian Federation
3. Federal Center of Cardiovascular Surgery, Krasnoyarsk, Russian Federation
4. Federal Center of Cardiovascular Surgery, Khabarovosk, Russian Federation
5. Medical University Lodz, Lodz, Poland
6. Unfallkrankenhaus Berlin, Berlin, Germany