We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitlePreface to the second edition.AuthorsOlesen, JesAbstractExplains the second edition of the "International Classification of Headache Disorders," issued by the International Headache Society.PublicationCephalalgia, 2004, Vol 24, p9ISSN0333-1024Publication typeAcademic JournalDOI10.1111/j.1468-2982.2003.00824.x