755-nm Q-switched alexandrite laser does not markedly benefit Becker's nevus: a retrospective analysis of 59 casesZhong, Yiping; Huang, Lining; Chen, Yongjun; Yan, Tingting; Yang, Bin*; Man, Mao-Qiang*Science Citation Index Expanded南方医科大学摘要-关键词ND-YAG LASER HYPERPLASIA PREVALENCE