PT - JOURNAL ARTICLE ED - British Medical Journal Publishing Group TI - Correction AID - 10.1136/bmjopen-2013-003190corr1 DP - 2013 Aug 01 TA - BMJ Open PG - e003190corr1 VI - 3 IP - 8 4099 - http://bmjopen.bmj.com/content/3/8/e003190corr1.short 4100 - http://bmjopen.bmj.com/content/3/8/e003190corr1.full SO - BMJ Open2013 Aug 01; 3