@article{2021-01-22, author = {, , , , , , , , , , , , , , , , , , , , , , }, title = {}, year = {2021}, doi = {10.1186/s13063-020-04977-w}, publisher = {NP «NEICON»}, abstract = {}, URL = {https://covid19.neicon.ru/publication/6982}, eprint = {https://covid19.neicon.ru/files/2845}, }