id	domain	url
mkg-1055	www.teachhealthk12.uthsca.edu	http://www.teachhealthk12.uthsca.edu/pa/pa09/pa09pdf/0906lsn.pdf
mkg-1055	www.merck.com	http://www.merck.com/pubs/mmanual_ha/sec3/ch39/ch39e.html
mkg-1055	en.wikipedia	http://en.wikipedia
mkg-1055	www.ncbi.nlm.nih.gov	http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=retri
mkg-1055	www.dentalcomfortzone.com	www.dentalcomfortzone.com/archive/missingteeth.html