1. Diagnosis and Management of Headache in Older Adults
Amaal J. Starling, MD 
Mayo Clinic Proceedings 
Volume 93, Issue 2, Pages (February 2018)
DOI: /j.mayocp
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2. Figure Diagnosis flow chart for primary headache disorder.
Mayo Clinic Proceedings  , DOI: ( /j.mayocp )
Copyright © 2017 Mayo Foundation for Medical Education and Research Terms and Conditions

3. Mayo Clinic Proceedings 2018 93, 252-262DOI: (10. 1016/j. mayocp. 2017
Copyright © 2017 Mayo Foundation for Medical Education and Research Terms and Conditions