Sleeman, K. E., Cripps, R. L., Murtagh, F. E., Oluyase, A. O., Hocaoglu, M. B., Maddocks, M., …on behalf of the CovPall Study Team. (2022). Change in Activity of Palliative Care Services during the Covid-19 Pandemic: A Multinational Survey (CovPall). Journal of palliative medicine, 25(3), 465-471. https://doi.org/10.1089/jpm.2021.0315