Towards a definition of an existential approach in cancer patients: a co-produced scoping review - Anouk M. de Sain; Carla Ruis; Margot L. Zomers; Marjon E. G. ten Hoor-Suykerbuyk; Theo Kuunders; Filip Y. F. L. de Vos; Astrid Janssens; Tatjana Seute (PLoS ONE, 2025)