Klein, E., R. Shapiro, J. B.-. Dahan, M. Simcha, Y. Azuri, and A. Rosen. “A Prospective, Randomized, Three Arm, Open Label Study Comparing the Safety and Efficacy of PP110, a Novel Treatment for Hemorrhoids to Preparation-H® Maximum Strength Cream in the Treatment of Grade 2–3 Hemorrhoids”. Molecular Cellular Therapy and Mechanism, vol. 3, no. 1, Mar. 2023, pp. 1-6, doi:10.13052/s40591-015-0043-5.