For the original study, the most visited health information web sites were selected through the PageRank® (Google®) system. 
PageRank
For the original study, the most visited health information web sites were selected through the PageRank® (Google®) system. 
Google
The present study evaluated the quality of the same web sites from February to May 2013, using the method developed by Bermúdez-Tamayo et al. and HONCode® criteria.



HONCode