Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.
APA4ort.xyz Knowledge Graph. (2026). The “no problems”-problem: an empirical analysis of ceiling effects on the EQ-5D 5L. Retrieved May 24, 2026, from https://4ort.xyz/entity/the-no-problems-problem-an-empirical-analysis-of-ceiling-effects-on-the-eq-5d-5l
MLA“The “no problems”-problem: an empirical analysis of ceiling effects on the EQ-5D 5L.” 4ort.xyz Knowledge Graph, 4ort.xyz, 24 May. 2026, https://4ort.xyz/entity/the-no-problems-problem-an-empirical-analysis-of-ceiling-effects-on-the-eq-5d-5l.
BibTeX@misc{4ortxyz_the-no-problems-problem-an-empirical-analysis-of-ceiling-effects-on-the-eq-5d-5l_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{The “no problems”-problem: an empirical analysis of ceiling effects on the EQ-5D 5L}}, year = {2026}, url = {https://4ort.xyz/entity/the-no-problems-problem-an-empirical-analysis-of-ceiling-effects-on-the-eq-5d-5l}, note = {Accessed: 2026-05-24}}
LLM promptAccording to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): The “no problems”-problem: an empirical analysis of ceiling effects on the EQ-5D 5L — https://4ort.xyz/entity/the-no-problems-problem-an-empirical-analysis-of-ceiling-effects-on-the-eq-5d-5l (retrieved 2026-05-24)
