title: Painless Horner's syndrome in cluster headache.
authors.forename: V K
authors.initials: VK
authors.lastname: Gupta
mesh_terms: D003027:Cluster Headache / Q000150:complications* / Q000503:physiopathology; D006732:Horner Syndrome / Q000150:complications* / Q000503:physiopathology; D006801:Humans; D007429:Intraocular Pressure; D013997:Time Factors