Successful Treatment of Ulcerative-Type Pyoderma Gangrenosum with a Combination Therapy of Oral Prednisolone, Vacuum-Assisted Closure, and Skin Grafting. - Goto, Hiroyuki; Okada, Yoshimoto; Watanabe, Seimi; Danno, Kanako; Yamamoto, Shinya; Ishiura, Ryohei; Nakayama, Yuichi; Mitsui, Kohei; Ueki, Ayaka; Nakai, Yasuo; Narushima, Mitsunaga; Yamanaka, Keiichi (Case Reports in Dermatology, 2021)