We used the COVID-evidence database to foster collaboration and evidence generation on COVID-19: "Mortality outcomes with hydroxychloroquine and chloroquine in COVID-19: an international collaborative meta-analysis of randomized trials" (preprint). The thus far largest meta-analysis of RCTs on hydroxychloroquine  and chloroquine in COVID-19, including 26 trials, most of them unpublished

We sincerely thank all trial investigator teams for this timely collaboration!