TY - RPRT TI - Primary headaches: a convergence hypothesis. AU - Roger Cady AU - Curtis Schreiber AU - Kathleen Farmer AU - Fred Sheftell PY - 2002 DO - 10.1046/j.1526-4610.2002.02053.x UR - https://pubmed.ncbi.nlm.nih.gov/11903544/ ID - 11903544 ER -