JUST POSTED ON TAP ONLINE: GENERAL HOSPITAL. Remember the SEC's investigation into Bill Frist's conveniently-timed sale of stock from his family's hospital chain, HCA? This week's news that the for-profit hospital behemoth is selling to a group of private equity investors has reminded people of that ongoing investigation. Maggie Mahar, author of the new book Money-Driven Medicine, tells the story of the Frist family empire and contemplates the larger saga of for-profit hospitals in America -- a history marked by cycles of boom, bust, and scandal. Take a look.