Fig. 7
From: Coronavirus disease 2019 (COVID-19): an evidence map of medical literature
Fractions of articles by a topic, b type, and c speciality from 14 January to 24 March 2020
Fig. 7 | BMC Medical Research Methodology
From: Coronavirus disease 2019 (COVID-19): an evidence map of medical literature
Fractions of articles by a topic, b type, and c speciality from 14 January to 24 March 2020