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. 2021 Aug 31;8:1616–1637. doi: 10.1016/j.toxrep.2021.08.007
Thus, the presence of a significant number of CFs that became directly related to COVID-19 in the biomedical literature in 2020 showed that the ID literature could be used to identify indirectly-related CFs to COVID-19 that had promise of becoming directly related CFs as the core COVID-19 literature expanded and incorporated more CF identification studies.