Study Exclusion reasons Remarks Reference(s)
Mehra, 2020 retrospective cohort other the paper was retracted by 3 authors on June 4, 2020

Mehra MR Lancet 2020 May 22;S0140-6736(20)31180-6. 10.1016/S0140-6736(20)31180-6

Mehra MR Lancet 2020 Jun 13;395(10240):1820. 10.1016/S0140-6736(20)31324-6

 
Guerin, 2020 non randomized controlled trial other no binary endpoints

Guérin, Preprints 2020, 2020050486 (doi: 10.20944/preprints202005.0486.v1).