Blood biomarkers of inflammation and brain-derived neurotrophic factor can not be used to assess the effectiveness of collagen mesotherapy in chronic cervical myofascial pain syndrome. A pilot single-blind randomized study. - Koszela K; Paradowska-Gorycka A; Kwiatkowska B; Woldańska-Okońska M; Stypińska B; Ejma-Multański A; Gasik R (Rheumatology international, 2026)