Study		Exclusion reasons	Remarks	Reference(s)
Rimland, 2020	single-arm
Toniati, 2020	observational study	no control group		Toniati Autoimmun Rev 2020; 19:102568 10.1016/j.autrev.2020.102568
Price, 2020	retrospective cohort	no control group		Price Chest 2020; : 10.1016/j.chest.2020.06.006