PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1136/bmjopen-2015-010197corr1 DP - 2017 Feb 01 TA - BMJ Open PG - e010197corr1 VI - 7 IP - 2 4099 - http://bmjopen.bmj.com/content/7/2/e010197corr1.short 4100 - http://bmjopen.bmj.com/content/7/2/e010197corr1.full SO - BMJ Open2017 Feb 01; 7