Chaksai, J., N. Soiwo, P. Sanchaisuriya, P. Sarakarn, and K. Sanchaisuriya. “Anemia in working age: a retrospective-cohort study”. Archives of Allied Health Sciences, vol. 24, no. 2, Aug. 2012, pp. 135-42, https://he01.tci-thaijo.org/index.php/ams/article/view/66274.