Wikipedia talk:Choosing Wisely/American Headache Society

Improper reference

Reference 4 in the first item of the 2013 list is not properly formed.

• Headache Classification Subcommittee of the International Headache Society (2004). "International classification of headache disorders". Cephalalgia. 4 (1): 1–151. {{cite journal}}: Unknown parameter |month= ignored (help)

As there are three other references for this statement, I am resolving this by declining to cite this reference. The society ought to be contacted also. Blue Rasberry (talk) 18:16, 18 December 2013 (UTC)