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APA Citation
Butler, J., Nath, M., Blana, D., Ball, W., Beech, N., Black, C., Osler, G., & Peytrignet, S. (2022). the clinically extremely vulnerable to COVID: Identification and changes in healthcare while self-isolating (shielding) during the coronavirus pandemic. International journal of population data science, 7, . http://access.bl.uk/ark:/81055/vdc_100164397342.0x000001