Nazarian, R. S., Vyas, N., Scheinfeld, N., & Phelps, R. G. (2019). Bilateral Porokeratosis Ptychotropica on the Gluteal Cleft: A Case Report and Review of the Literature. SKIN The Journal of Cutaneous Medicine, 3(6), 427–430. https://doi.org/10.25251/skin.3.6.11