At McGovern Medical School, I appreciate the great support from Drs. Sean Blackwell, Patricia Butler, and Pam Berens, without whom I would not have been able to complete this book. I want to acknowledge the many medical students who have helped to sharpen the focus of this book, provided critiques, and identified those pesky grammar and explanatory errors, especially Joy Davis, who served to review the content, compare it to national educational guidelines, emphasize material relevant to the medical student level, and served as principal content reviewer. Joy would like to acknowledge her parents, Jim and Carolyn, for their steadfast support, love, and encouragement. Of course, the words and ideas could not have made it to words, phrases, and meaningful concepts without my ever-reliable, incredibly talented daughter Allison, who has risen to wizard status of medical writing and editing.