Myeong-In Kim, Ji-Eun Sim, Ye-Eun Kim, Dah-Young Rhee , Woo-Hyuk Jang, “Effects of Smartphone use During Defecation and Smartphone Dependency on Incidence of Anal Disease in Adults”, Annals of RSCB, vol. 25, no. 6, pp. 20966–20975, Nov. 2021.