for lending their time and medical expertise to strengthen this work. Lori Bushore, for so much help with all of the paperwork, deadlines, and rules. Amy, for knowing exactly what I'm thinking, for knowing exactly what I need to hear, and for making me laughoften, and at myself. Seriously, the best sister ever. Mom and Dad, for everythingbecause you have given me nothing short of that. If I could have chosen my parents, I would have chosen you. And finally, to Sam, for helping me to be my best, and for standing by me when I'm at my worst. In the end, it has been the thoughts of our future that gave me the strength to finish what I started. Because such kindness and generosity is not easily repaid, I will search for opportunities to pay forward the gifts that each of you have shared with me.