Four cases of hyperpigmentation induced by systemic use of polymyxin B
Zhang Liangliang, Xu Qiuyun, Bao Chengbei, Cheng Bo, Ji Chao, Fang Wenhua
Chinese Journal of Dermatology . 2022, (5): 439 -441 .  DOI: 10.35541/cjd.20200407