Google officially unveiled its foray into medical records when Chief Executive Eric Schmidt introduced Google Health at a healthcare conference in Florida. Google representatives said the company has signed deals with hospitals and companies including medical tester Quest Diagnostics Inc, health insurer Aetna Inc, Walgreens and Walmart Stores Inc pharmacies. The Web service is password protected, stores health records on Google computers, and includes a medical services directory that lets users import doctors' records, drug history and test results.