Salivary inflammatory markers in tension type headache and migraine: the SalHead cohort study - Bougea, Anastasia; Spantideas, Nikolaos; Galanis, Petros; Katsika, Paraskevi; Boufidou, Fotini; Voskou, Panagiota; Vamvakaris, Ioannis; Anagnostou, Evangelos; Nikolaou, Xrysa; Kararizou, Evangelia (Neurological sciences, 2020)