The hiring challenge for area hospitals is two-fold: finding enough people to fill entry-level health care positions, while at the same time looking for physicians, advance practice nurses, physicians assistants and medical coders - positions that require more education and promise much higher salaries. In Greater Cleveland, more than 53,000 jobs – 54.2 percent of the health care workforce - don't require undergraduate degrees, according to a report released Thursday by the Washington, D.C.-based Brookings Institution. Those jobs are classified as pre-baccalaureate or pre-BA occupations.