title: Searching the Web. The power of portals.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006266:Health Education / Q000379:methods*; D006801:Humans; D007255:Information Services; D020407:Internet; D008297:Male; D008875:Middle Aged; D010414:Pennsylvania; D012680:Sensitivity and Specificity