PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1136/bmjopen-2014-007455corr1 DP - 2015 Nov 01 TA - BMJ Open PG - e007455corr1 VI - 5 IP - 11 4099 - http://bmjopen.bmj.com/content/5/11/e007455corr1.short 4100 - http://bmjopen.bmj.com/content/5/11/e007455corr1.full SO - BMJ Open2015 Nov 01; 5