The next time you think about turning to the emergency room for treatment of that mystery stomach pain, consider that you may wait more than four hours to seea doctor.

That?s what researchers at the Press Ganey Associates Inc. found in a survey of 1,500 U.S. hospitals. Maryland ranked 45 out of 50 states for speed of service in the emergency waiting room, with an average wait time of four hours and 37 minutes.