[1] Ist Sci San Raffaele, Invas Cardiol Unit, I-20132 Milan, Italy
[2] Castle Hill Hosp, Invas Cardiol Unit, Kingston Upon Hull, E York, England
[3] Hosp Badalona Germans Trias & Pujol, Invas Cardiol Unit, HCA, Badalona, Spain
[4] Imperial Coll Healthcare NHS Trust, Dept Cardiovasc Med, London, England
[5] Sir Charles Gairdner Hosp, Invas Cardiol Unit, Nedlands, WA 6009, Australia
[6] William Beaumont Hosp, Royal Oak, MI 48072 USA
[7] Hosp Italiano Buenos Aires, Invas Cardiol Unit, Buenos Aires, DF, Argentina
[8] Univ Toronto, Sunnybrook Hlth Sci Ctr, Schulich Heart Ctr, Toronto, ON, Canada
[9] Humanitas Inst, Invas Cardiol Unit, Milan, Italy
[10] Geisinger Med Ctr, Danville, PA 17822 USA
[11] Henry Hood Ctr Hlth Res, Danville, PA USA
[12] St Vincent Hosp, Worcester Med Ctr, Invas Cardiol Unit, Boston, MA USA
[13] Columbia Univ, Med Ctr, Invas Cardiol Unit, New York, NY USA