Sero-negative neuromyelitis optica spectrum disorder as a presenting feature of systemic lupus erythematosus: A rare case report. - Zaki, Ahmad Syahmi Yusof; Chee, Yong Chuan; Nawi, Siti Nurbaya Mohd; Sapiai, Nur Asma; Ghazali, Wan Syamimee Wan (Electronic Journal of General Medicine, 2026)