PT  - JOURNAL ARTICLE
ED  - ,
TI  - Correction
AID  - 10.1136/bmjopen-2013-004668corr1
DP  - 2014 Jun 01
TA  - BMJ Open
PG  - e004668corr1
VI  - 4
IP  - 6
4099  - http://bmjopen.bmj.com/content/4/6/e004668corr1.short
4100  - http://bmjopen.bmj.com/content/4/6/e004668corr1.full
SO  - BMJ Open2014 Jun 01; 4