Nazarian RS, Vyas N, Scheinfeld N, Phelps RG. Bilateral Porokeratosis Ptychotropica on the Gluteal Cleft: A Case Report and Review of the Literature. J of Skin [Internet]. 2019Dec.2 [cited 2024Sep.20];3(6):427-30. Available from: https://dermsquared.com/skin/article/view/593