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The editors gratefully acknowledge communication and correspondence from colleagues all over the world who have offered insightful suggestions to improve this text. We particularly wish to acknowledge the following individuals who have provided careful and studious commentary on numerous chapters: Shabnam Madadi, MD, Cardiac Imaging Center, Shahid Rajaei Heart Center, Tehran, Iran; Azin Alizadeh Asl, MD, Tabriz University of Medical Sciences and Madani Heart Hospital, Tabriz, Iran; Leili Pourafkari, MD, Razi Hospital, Tabriz, Iran; Banasiak Waldemar, MD, Centre for Heart Disease, Military Hospital, Wroclaw, Poland; Carlos Benjamín Alvarez, MD, PhD, Sacré Coeur Institute, Buenos Aires, Argentina; Elias B. Hanna, MD, Division of Cardiology, Louisiana State University, New Orleans, Louisiana.

We are also indebted to Dr. Jun-o Deguchi, Dr. Michael Markl, Dr. Vera Rigolin, and Dr. Carol Warnes for the images used on the cover.

Dr. Libby thanks Sara Karwacki for expert editorial assistance.