@article{Greenhalgh_T-2020_11730,
title = {Face masks for the public during the covid-19 crisis},
author = {Greenhalgh, T. and Schmid, M. and Czypionka, T. and Bassler, D. and Gruer, L.},
month = {apr},
year = {2020},
abstract = {No abstract available.},
volume = {369},
journal = {BMJ},
publisher = {BMJ Publishing Group},
url = {http://dx.doi.org/10.1136/bmj.m1435},
}
