Dr. Paul Tang, the Palo Alto Medical Foundation's long-time leader in all things digital, has left the building. Tang left PAMF, a 1,400-physician Sutter Health affiliate, April 4 to take on the newly created role of chief health transformation officer at IBM Watson Health, the new cognitive health computing unit of giant IBM (NYSE: IBM). IBM has made $4 billion in acquisitions and added more than 5,000 employees through those deals to augment the unit's staff of more than 6,000, partnering with...