@article{Cai2021,
author = {Cai, Z. and Yang, Y. and Zhang, J.},
title= {Obesity is associated with severe disease and mortality in patients with coronavirus disease 2019 (COVID-19): A meta-analysis},
year = {2021},
doi = {10.1186/s12889-021-11546-6},
volume = {21},
number = {1},
pages = {1505},
}