The Impact of COVID-19 Pandemic on Palliative Care Services as Perceived by Healthcare Professionals: A Systematic Review - Kalliopi Perdikouri, Petros Galanis, Maria Katharaki, Eirini Grammatopoulou, George Baltopoulos, Aglaia Katsiroumpa and Theodoros Katsoulas (Professor Despina Sapountzi-Krepia, 2023)