Ratanasiri, T., W. Prasertcharoensuk, S. Leuangwattanawanit, G. Fucharoen, and C. Wongkam. “Preliminary Experiences With Cordocentesis at Srinagarind Hospital”. Srinagarind Medical Journal, vol. 9, no. 3, Nov. 2013, pp. 116-23, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13756.