DORJEY, Y. OA1 Association of maternal serum beta human chorionic gonadotropin (). Bhutan Health Journal, [S. l.], v. 5, n. 1, p. 1–8, 2020. DOI: 10.47811/bhj.110. Disponível em: https://bhj.com.bt/index.php/bhj/article/view/74. Acesso em: 26 apr. 2024.