Compares the dynamics of daily deaths in the 10 days following the 3rd death in countries using and not using [H]CQ, showing dramatically lower death in [H]CQ countries. This paper does not attempt to account for population age and other differences between the countries and recommends further study.
This study is excluded in the after exclusion results of meta
excessive unadjusted differences between groups.
Izoulet et al., 21 Apr 2020, retrospective, multiple countries, preprint, 1 author, dosage not specified.