Toshiyuki Hikita   Hitomi Goda   Yasuko Ogawa   Toshiyuki Kudo   Kiyomi Ito   
Pediatrics international : official journal of the Japan Pediatric Society 65(1) e15429 2023年1月
BACKGROUND: Caffeine consumption is a risk factor for chronic daily headache but few studies have addressed relationships between pediatric patient caffeine levels and headache severity. We examined associations between serum and urine caffeine le...