Song, D., X. wei Dai, and C. sheng Chen. “Evaluation of the Treatment of II and III Degree Hemorrhoids: A Comparison of Mucosa Suspension Procedure for Prolapse and Hemorrhoids, Shenyang City, China, 2006-2009”. Colombia Medica, vol. 42, no. 2, June 2011, pp. 219-23, doi:10.25100/cm.v42i2.774.