Bhattacharyya N (2006) Clinical and symptom criteria for the accurate diagnosis of chronic rhinosinusitis. Laryngoscope 116:1–22 Article PubMed Google Scholar Sizer PS, Phelps V, Azevedo E et al (2005) Diagnosis and management of cervicogenic headache. Pain Pract 5:255–274 Article PubMed Goog...