cohort_flow_chart a Searched for all records in: Web of Science Core Collection                       For research article or literature review that contains in title or abstract the term: origin AND one or more of the terms: zoonotic  OR  genome  OR  recombin OR  gain of function AND contains in title or abstract one or more of the terms: covid, coronavirus, COVID-19, SARS-CoV-2, 2019-nCoV, HCoV-19, hCoV-19.                       Total records retrieved N =344 b Removed records that met one or more the following conditions: same corresponding author,  topic not relevant by hand-inspection, no email. Total records removed N = 73 a->b c Included records: N = 271 a->c d Identified the corresponding author, and retrieved their emails when available: N = 271 c->d e Currently invited authors: N = 271 d->e f Undelivered emails: N = 34 e->f g Net number invited authors: N = 237 e->g