Mohammad Omar Faruq et al. 2023. Role of Nigella Sativa (Black Cumin Seeds) as an Adjunct Therapy in Treating Severe and Critical COVID -19 Infection Compared to Those with Standard Therapy: An Open Label Randomized Clinical Trial. Bangladesh Critical Care Journal. 11, 2 (Oct. 2023), 75–82. DOI:https://doi.org/10.3329/bccj.v11i2.69187.