Maneeprasopchoke, P., P. Phousamran, W. Pongsapich, P. Pithuksurachai, J. Worrakulpanit, T. Keawvijit, N. Poungvarin, K. Amornpichetkul, and C. Chongkolwatana. “A Comparison of Serum Copper Levels in Patients with Papillary Thyroid Carcinoma, Nodular Goiter, and Healthy Volunteers”. Siriraj Medical Journal, vol. 75, no. 1, Jan. 2023, pp. 38-45, doi:10.33192/smj.v75i1.260528.