Don’t have #clusterheadache, but want to support the efforts to demand the Centers for Medicare and Medicaid Services to overturn the archaic rule of denying coverage of home-use high-flow oxygen for acute attacks? Check out AHDAorg on FB or Twitter to add your name to a letter from the #Headache & #Migraine community! #CMSGov can’t ignore hundreds or even thousands of signatures! Please share on your social channels. #O2forCluster #clusterhead #clusterheadaches #chronicpain #clusterrelief #clustertreatment #invisibleillness