TY - CONF T1 - An international study of emergency physicians' practice for acute headache management and the need for a clinical decision rule JO - CANADIAN JOURNAL OF EMERGENCY MEDICINE PY - 2009/11/01 AU - Perry JJ AU - Eagles D AU - Clement CM AU - Brehaut J AU - Kelly AM AU - Mason S AU - Stiell IG ED - VL - 11 IS - 6 SP - 516 EP - 522 Y2 - 2024/12/22 ER -