Excerpt: [David M.] Lawrence stepped into Kaiser's top job when the nation was on the cusp of the managed-care revolution.... To Lawrence, the past 10 years in health care have been turbulent but he expect the next 10 years to be even more so. Advances in biotechnology and microcircuitry, he speculates, will create drugs and devices that will benefit patients enormously -- but at what cost? And who will have access to them?