U.S. patients not only are spending too much on medical treatments, there are still too many ways dollar-driven health care causes harm, according to a top official with the American Cancer Society. Dr. Otis Brawley, the cancer society's chief medical and scientific officer, told an audience of physicians-to-be last week that medicine's scientific basis too often takes a backseat to superfluous concerns. An address to students at NYIT's School of Osteopathic Medicine in Old Westbury, the lecture was designed as one in a series of talks on provocative subjects in medical care. Brawley tackled high costs and the irrational use of medical resources.