Dr. Joon Yun is managing partner and president of Palo Alto Investors, LLC, a hedge fund founded in 1989 with $2 billion in assets invested in healthcare. Board certified in radiology, Joon served on the clinical faculty at Stanford from 2000-2006. Joon has served on numerous boards, and he is currently a trustee of the Salk Institute. Joon is a member of the President's Circle of the National Academies of Sciences, Engineering, and Medicine. Joon has published numerous patents and scientific articles. Joon and his wife Kimberly launched the $1 million Palo Alto Longevity Prize in 2013 to reverse the aging process and recently donated $2 million to launch the National Academy of Medicine Aging and Longevity Grand Challenge.