Maverakis, E., Marzano, A.V., Le, S.T. et al.  Pyoderma gangrenosum. Nat Rev Dis Primers  6,  81 (2020). https://doi.org/10.1038/s41572-020-0213-x

Goldust M, Hagstrom EL, Rathod D, Ortega-Loayza AG. Diagnosis and novel clinical treatment strategies for pyoderma gangrenosum. Expert Rev Clin Pharmacol. 2020 Feb;13(2):157-161. doi: 10.1080/17512433.2020.1709825. Epub 2020 Jan 6. PMID: 31875484.