In an exclusive interview, Jeff Tangney, co-founder of medical app Epocrates, talks with Modern Healthcare IT reporter Joseph Conn. Tangney, now CEO of Doximity, a mobile-oriented physician networking service, discusses the heady days before the dot.com bubble burst, whether another bubble is inflating now and what the future holds for mobile healthcare. Read the related Dec. 10 Information Technology feature, "Most-healthful apps."