Guo, H., Li, J.-H., Yang, X.-Y., Wang, X.-L., Cao, J., Zheng, S., & Chen, H.-D. (2015). Giant Ulcer on Abdominal Wall: A Quiz. Acta Dermato-Venereologica, 96(3), 427–431. https://doi.org/10.2340/00015555-2275