The past week, San Francisco was overrun with more neckties than the city has ever seen at one time. In customary form, the annual JP Morgan Healthcare Conference kicked off a global, multiday shopping spree and advertising expo for large and small, traditional and boutique, biotech and life science companies, and the investors who love them. It even draws thousands of entrepreneurs who head to San Francisco in spite of not gaining entry to JP Morgan, in the hope of rubbing some meaningful elbows at the numerous after-parties…