Ramsay, SE; Whincup, PH; Hardoon, SL; Lennon, LT; Morris, RW; Wannamethee, SG; (2011) Social Class Differences in Secular Trends in Established Coronary Risk Factors over 20 Years: A Cohort Study of British Men from 1978-80 to 1998-2000. PLOS ONE , 6 (5) , Article e19742. 10.1371/journal.pone.0019742. Green open access