An elite group of up-and-coming biotech companies from around the country – as well as a number of the nation?s biggest, most successful health-related firms – will be making presentations this week to the investment community at the 30th annual J.P. Morgan Healthcare Conference in San Francisco, Monday through Thursday. Cellular Dynamics International, the Madison company founded by UW-Madison stem cell pioneer James Thomson, will be among them. It will be the second year that CDI has been invited to participate in the event, considered the biggest and most prestigious in life sciences in the U.S., said CDI chief executive Robert Palay.