1. The Section of Cardiology; Baylor College of Medicine; Houston TX
2. Texas Heart Institute; Saint Luke's Episcopal Hospital; Houston TX
3. Hospital Universitario Son Espases; Unidad Coronaria; Palma de Mallorca; Spain
4. Institute Català Ciències Cardiovasculars; Barcelona Spain
5. Department of Cardiology, Heart Center, Tampere University Hospital and University of Tampere; Medical School; Tampere Finland