Dr. Jeffrey Greene is the Infectious Disease Section Chief at Tisch Hospital/NYU Medical Center. Dr. Greene was selected as one of the Best Doctors in New York by "New York Magazine," one of the Best Doctors in America by "American Health m"agazine, and one of the Best Internists in the Nation by "Town and Country "magazine. He has also received the New York City Police Commissioner's Commendation of Honor for Heroic Action. He lives in New York City. Karen Moline is a journalist whose articles have appeared in dozens of publications around the globe. She is the author of two novels, "Belladonna" and "Lunch, " and a ghostwriter of many nonfiction books. She lives in New York City with her son.