Health insurer Aetna on Wednesday is unveiling a new Web-based health research service to employers that provide employee health benefits through the company, the New York Times reports. The free service, called SmartSource, was first piloted for Aetna’s 35,000 employees and will roll out to other employers nationwide in August. Designed to help beneficiaries better manage their own care, SmartSource uses an online medical search engine and information from Aetna insurance claims to create medical profiles for each user. Participants will be able to access relatively personalized information that relates to their illnesses, diagnostic tests and frequent searches. Some industry experts, however, suggest that claims data provides a limited and even outdated view into individuals’ care and health concerns, noting that more useful data would come from physicians and hospital visits. Aetna’s vice president for online programs, meanwhile, says that tapping physicians and hospitals for the personalized information is part of the program’s end goal to ensure individuals are “as engaged as possible in managing [their] health care” (Freudenheim, New York Times, 3/12/08 [registration required]).