# Green Flags and headache: A concept study using the Delphi method

> Research article (Headache The Journal of Head and Face Pain, 2021) · cited 36× · AI/ML

**Wikidata**: [openalex:W3118649677](https://www.wikidata.org/wiki/openalex:W3118649677)  
**Source**: https://4ort.xyz/entity/green-flags-and-headache-a-concept-study-using-the-delphi-method