Corrections
Preferred reporting items for systematic review and meta-analysis protocols (PRISMA-P) 2015: elaboration and explanation
BMJ 2016; 354 doi: https://doi.org/10.1136/bmj.i4086 (Published 21 July 2016) Cite this as: BMJ 2016;354:i4086This Research Methods and Reporting paper (BMJ 2015;350:g7647, doi:10.1136/bmj.g7647) should have the volume number 350 (not 349).