Chaowarat, Kittipong, Sermsin Sindhubodee, Vorapot Choonhaklai, Viroj Chittchang, Somkiat Pumpaisanchai, Nattapong Wongwattanasatien, Tanet Thaidumrong, Chawawat Kosrisirikul, and Matchima Huabkong. 2018. “Incidence and Risk Factors Associated With Retrorenal Colon”. Insight Urology 39 (2):20-27. https://he02.tci-thaijo.org/index.php/TJU/article/view/114996.