Bulletin of the World Health Organization
Volume 100(5);  2022 May 1
https://www.ncbi.nlm.nih.gov/pmc/issues/406286/

Systematic Reviews
Catastrophic health expenditure in sub-Saharan Africa: systematic review and meta-analysis
Paul Eze, Lucky Osaheni Lawani, Ujunwa Justina Agu, Yubraj Acharya
Bull World Health Organ. 2022 May 1; 100(5): 337–351J. Published online 2022 Apr 4. doi: 10.2471/BLT.21.287673
PMCID: PMC9047424