article_metadata: Panagiotis Kousoulis Jiannis Hajiioannou Vassiliki Florou Dimitrios Kretzas George Korres
article_metadata: 10.1155/2013/836064
article_metadata: Case Rep Otolaryngol
article_metadata: 2013;2013:836064.
article_metadata: CC BY
article_metadata: https://pubmed.ncbi.nlm.nih.gov/24368959/
article_metadata: PMC3867860
article_metadata: 24368959
article_metadata: Excessive paranasal sinuses and mastoid aeration as a possible cause of chronic headache
article_metadata: 2013