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2. Howlader N Noone AM Krapcho M Neyman N Aminou R Waldron W Altekruse SF Kosary CL Ruhl J Tatalovich Z Cho H Mariotto A Eisner MP Lewis DR Chen HS Feuer EJ Cronin KA Edwards BK SEER cancer statistics review, 1975-2008, National Cancer Institute 2011 http://seer.cancer.gov/csr/1975_2008/browse_csr.php?section=20&page=sect_20_table.06.html
3. Professional and community efforts to prevent morbidity and mortality from oral cancer;Alfano;J Am Dent Assoc.,2001
4. Maryland adults' knowledge of oral cancer and having oral cancer examinations;Horowitz;J Public Health Dent.,1998