Boland, J. W., Allgar, V., Boland, E. G., Kaasa, S., Hjermstad, M. J., & Johnson, M. J. (2019). Predictors and trajectory of performance status in patients with advanced cancer: A secondary data analysis of the international European Palliative Care Cancer Symptom study. Palliative Medicine, 33(2), 206-212. https://doi.org/10.1177/0269216318811011