Icecream headache
http://homepage2.nifty.com/uoh/zutsuu/400kinousei_ha4.htm#アイスクリーム頭痛
日文解説
http://www.brainfreeze.co.uk/Headache.html
http://kidshealth.org/kid/talk/qa/ice_cream_headache.html
http://www.howstuffworks.com/question96.htm
簡單英文衛教資料
http://bmj.bmjjournals.com/cgi/content/full/314/7091/1364
BMJ的review paper(但它是1997年的...)