In this Research paper by Huan Song and colleagues (BMJ 2015;351:h3867, doi:10.1136/bmj.h3867) the abstract wrongly states the number of participants. The correct number is 405 211 patients (not 405 172).
Cite this as: BMJ 2015;351:h4134
In this Research paper by Huan Song and colleagues (BMJ 2015;351:h3867, doi:10.1136/bmj.h3867) the abstract wrongly states the number of participants. The correct number is 405 211 patients (not 405 172).
Cite this as: BMJ 2015;351:h4134