The 21 Focus of Review topic areas were further broken down into 291 sub-topic categories. There were 34 sub-topics with no reviews available including: hormone replacement therapy, infertility, Norwalk virus, autism, and elder abuse, among others ( Table 4 ). The 21 Focus of Review topic areas that had sub-topics with no review included adult health, communicable disease/infection, dental health, environmental health, food safety and inspection, parenting, and senior health. The largest proportion of sub-topic with no review was observed within communicable disease/infection (n = 12). Adult health was ranked sixth and communicable disease/ infection ranked tenth by registered users. Parenting was ranked as a fifth preference for visitors. The remaining sub-topic with no reviews within dental health, environmental health, food safety and inspection, and senior health were not a preference for either registered users or visitors. (+)few reviews as 1-150, (++)moderate reviews as 151-300, (+++)many reviews as 301 and greater