BibTex format
@article{Male:2021:10.1136/bmj.n2211,
author = {Male, V},
doi = {10.1136/bmj.n2211},
journal = {BMJ},
pages = {1--2},
title = {Menstrual changes after covid-19 vaccination},
url = {http://dx.doi.org/10.1136/bmj.n2211},
volume = {374},
year = {2021}
}