To my family, Lori, Alexander, Jonathan, and Gabrielle, and to my mentors, KJK, JDZ, and MJB.

—KENNETH A. EGOL

To my children who are constants in my life and have always been there for me. Thank you Courtney, Michael, and Lauren. And to my parents who provided me guidance and inspiration throughout my life.

—KENNETH J. KOVAL

To the residents and faculty of the NYU Langone Health Department of Orthopedic Surgery for all of their support during the past 30 years and to Ken Egol who has brought this book to new levels of excellence.

—JOSEPH D. ZUCKERMAN