Quality Index Score
Healia use patent-pending Quality Index Score™ to judge the quality of search results.
Thomas (Tom) Eng received a Small Business Innovation Research (SBIR) Award from the National Institutes of Health (NIH) in 2001 to develop this website. The National Cancer Institute (part of the NIH) assisted with research and development, and Healia was incorporated in March of 2005. It became available to the public in September of 2006. 
Healia was acquired by Meredith Corporation in June 2007.
The searching results are heavily US biased with many initial search results finding information from American web sites.