Comparative Effects of Photobiomodulation Therapy Versus Conventional Antioxidant Supplementation on Serum Glutathione Levels in Euthyroid Chronic Autoimmune Thyroiditis: A Prospective Open-Label Interventional Clinical Trial - Venera Berisha-Muharremi; Bernard Tahirbegolli; Alberta Humolli; Reem Hanna (Antioxidants, 2026)