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White, Nicola; Oostendorp, Linda; Vickerstaff, Victoria; Gerlach, Christina; Engels, Yvonne; Maessen, Maud; Tomlinson, Christopher; Wens, Johan; Leysen, Bert; Biasco, Guido; Zambrano, Sofia; Eychmüller, Steffen; Avgerinou, Christina; Chattat, Rabih; Ottoboni, Giovanni; Veldhoven, Carel; Stone, Patrick (2019). An online international comparison of thresholds for triggering a negative response to the "Surprise Question": a study protocol. BMC Palliative Care, 18(1), p. 36. BioMed Central 10.1186/s12904-019-0413-x
