Ethnic Differences in Disability Prevalence and Their Determinants Studied over a 20-Year Period: A Cohort Study Williams, Emily D. ; Tillin, Therese ; Whincup, Peter ; Forouhi, Nita G. ; Chaturvedi, Nishi Abstract Publication: PLoS ONE Pub Date: September 2012 DOI: 10.1371/journal.pone.0045602 Bibcode: 2012PLoSO...745602W