1. The limits of scientific reasoning;Faust,1984
2. U.S. Census Bureau. 12. Sex by age [49]—universe: total population data set: census 2000 summary file 1 (SF 1) 100-percent data. factfinder.census.gov/servlet/DTTable?_bm=y&-geo_id=01000US&-ds_name=DEC_2000_SF1_U&-_lang=en&-redoLog=false&-mt_name=DEC_2000_SF1_U_P012&-format=&-CONTEXT=dt.
3. Prevalence of heart disease—U.S. 2005;MMWR Morb Mortal Wkly Rep,2007
4. Heart disease and stroke statistics: 2007 update,2007
5. Congestive heart failure in the community: a study of all incident cases in Olmsted County, Minnesota, in 1991;Senni;Circulation,1998