Incident cases were defined using both the 10th Revision of the International Classification of Diseases (ICD-10) 23and the 2nd edition of the International Classification of Diseases for Oncology (ICD-O-2).
The present Volume is number 6 in the 2nd Edition of Comprehensive Supramolecular Chemistry, a major reference work with Jerry Atwood acting as editor in chief.
It is classified in group 3 of the 2nd Edition of The International classification of Headache Disorders (ICHD-II) along with other trigeminal autonomic cephalalgias (TACs).
Fundamental movement skills proficiency is measured using the 2nd edition of the Test of Gross Motor Development (TGMD-2) [ 23].
Diagnosis of other concomitant headache syndromes was based on the 2nd Edition of The International Headache Classification (ICHD-II) criteria [8].
NH was first described in 2002 [1] and it was subsequently included in the appendix of the 2nd edition of the International Classification of Headache Disorders [4].
