RT Journal Article SR Electronic T1 Socioeconomic inequalities in health and the use of healthcare services in Catalonia: analysis of the individual data of 7.5 million residents JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 97 OP 99 DO 10.1136/jech-2018-211360 VO 73 IS 2 A1 López-Casasnovas, Guillem YR 2019 UL http://jech.bmj.com/content/73/2/97.abstract AB