TY - JOUR T1 - Headache caused by straining JF - Clinical Medicine JO - Clin Med SP - 414 LP - 414 DO - 10.7861/clinmedicine.13-4-414 VL - 13 IS - 4 AU - Akish Luintel AU - Tim M Young Y1 - 2013/08/01 UR - http://www.rcpjournals.org/content/13/4/414.abstract ER -