- Correspondence to Dr Sol P Juárez, Centre for Health Equity Studies (CHESS), Stockholm University/Karolinska Institutet, Stockholm 106 91, Sweden;
- Received August 25, 2015
- Revised November 24, 2015
- Accepted December 8, 2015
- First published January 5, 2016.
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- Data supplement 1 - Online supplement
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