Sitticharoon, C., R. Klinjampa, X. Souvannavong-Vilivong, S. Chatree, P. Boonpuan, C. Sripong, N. Chi Nway, and T. Lertbunnaphong. “Serum Neuropeptide Y and Leptin Levels compared between Non-pregnant and Pregnant Women in Overall, Non-obese, and Obese Subjects”. Siriraj Medical Journal, vol. 70, no. 3, June 2018, pp. 204-12, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/129611.