Optical diagnosis of dermatofibrosarcoma protuberans differentiated from dermatofibroma using non-linear optical microscopy. Issue 3 (5th February 2022) - Tian, Wei; Zhu, Xiaoqin; Huang, Xiaomin; Huang, Ying; Lin, Yamin; Yang, Yinghong; Chen, Jianxin; Lin, Lihang