To Dr. Larry C. Gilstrap III, whose encouragement is largely responsible for my writing this series of books. He has been a personal inspiration, mentor, and role model of an outstanding physician, teacher, and leader; and to Dr. Edward Yeomans, who has been a dear friend and gleaming light of brilliance in obstetrics.

—ECT

To the medical and graduate students of the UT Health Medical School in Houston who continually challenge and make both teaching and research far more interesting; and to my son William and innumerable colleagues for their patience and encouragement during the writing and editing of the manuscript.

—DSL

To my patients, who humble me with their trust and respect; to my residents, students, and colleagues who challenge, teach, and inspire me; and of course to my family who support and encourage my passion.

—ASP

To my students, who continue to provide inspiration.

—SAT