Frequency of extractable nuclear antigen seropositivity among individuals seronegative for antinuclear antibodies on indirect immunofluorescence: a systematic review and meta-analysis. - Dhaouadi T; Zamali I; Ben Hmid A; Guizani M; Riahi A; Ben Abdallah T; Samoud S; Gorgi Y; Galai Y; Sfar I; Ben Ahmed M (Frontiers in immunology, 2026)