# The case-crossover design for studying sudden events

> Research article (BMJ Medicine, 2022) · cited 44× · AI/ML

**Wikidata**: [openalex:W4285815153](https://www.wikidata.org/wiki/openalex:W4285815153)  
**Source**: https://4ort.xyz/entity/the-case-crossover-design-for-studying-sudden-events