Google Inc. will begin storing the medical records of a few thousand people as it tests a long-awaited health service. The pilot project will involve 1,500 to 10,000 patients at the Cleveland Clinic who volunteered to an electronic transfer of their personal health records so they can be retrieved through Google's new service. Each health profile will be protected by a password that's also required to use other Google services such as e-mail and personalized search tools.