There is no correlation between the serum level of interleukin-21 and bullous pemphigoid
Li Sizhe, Yan Tianmeng, Li Li, Jin Hongzhong, Zuo Yagang
Chinese Journal of Dermatology . 2018, (8): 595 -596 .  DOI: 10.3760/cma.j.issn.0412-4030.2018.08.008