Emergency room doctors are using them to order lab tests and medication. Plastic surgeons are using them to show patients what they might look like after surgery. And medical residents are using them as a quick reference to look up drug interactions and medical conditions. Dr. Richard Watson shows Gustavo Pinor an X-ray of his sprained ankle on an iPad. Since Apple's iPad hit the market in April, doctors at Chicago area hospitals are increasingly using the hot-selling tablet as a clinical tool. Not only does the iPad allow doctors to view electronic medical records, wherever they are, it also...