Magnúsdóttir, I., Lovik, A., Unnarsdóttir, A., McCartney, D., Ask, H., Kõiv, K., Christoffersen, L., Johnson, S., Hauksdóttir, A., Fawns-Ritchie, C., Helenius, D., González-Hijón, J., Lu, L., Ebrahimi, O., Hoffart, A., Porteous, D., Fang, F., Jakobsdóttir, J., Lehto, K., Andreassen, O., Pedersen, O., Aspelund, T., Valdimarsdóttir, U. & COVIDMENT Collaboration 2022, 'Acute COVID-19 severity and mental health morbidity trajectories in patient populations of six nations: An observational study', The Lancet Public Health, 7(5), pp. e406-e416. https://doi.org/10.1016/S2468-2667(22)00042-1