@article{Higgins2003,
author = {Higgins, J.P. and Thompson, S.G. and Deeks, J.J. and Altman, D.G.},
title= {Measuring inconsistency in meta-analyses},
year = {2003},
doi = {10.1136/bmj.327.7414.557},
URL = {https://doi.org/10.1136/bmj.327.7414.557},
volume = {327},
number = {7414},
pages = {557‒560},
}