Raweesawat, Kobkun, Yupaporn Areepong, Saowanit Sukparungsee, and Katechan Jampachaisri. 2017. “Odds Ratio Estimation in Rare Data by Empirical Bayes Method”. Thailand Statistician 15 (2):149-56. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/92198.