Novel use of apremilast for adjunctive treatment of recalcitrant pyoderma gangrenosum - Mary E. Laird, BA; Lana X. Tong, MD; Kristen I. Lo Sicco, MD; Randie H. Kim, MD, PhD; Shane A. Meehan, MD; Andrew G. Franks, Jr., MD (Elsevier, 2017)