PT  - JOURNAL ARTICLE
ED - British Medical Journal Publishing Group
TI  - Correction
AID  - 10.1136/bmjopen-2013-004039corr1
DP  - 2014 Jan 01
TA  - BMJ Open
PG  - e004039corr1
VI  - 4
IP  - 1
4099  - http://bmjopen.bmj.com/content/4/1/e004039corr1.short
4100  - http://bmjopen.bmj.com/content/4/1/e004039corr1.full
SO  - BMJ Open2014 Jan 01; 4