Fig. 3From: Structured headache services as the solution to the ill-health burden of headache: 1. Rationale and descriptionLayered (above) and hub-and-spoke (below) structures. The bi-directional arrows indicate patient flows from lower levels to higher, and clinical and educational supports from higher to lower. Each structure is amenable to top-down or bottom-up organization for integration within existing health services, although bottom-up is more likely in layered structures and top-down in hub-and-spoke. Hybrid structures are possibleBack to article page