Zhou ZC, Guo LF, Gold MH. Hair removal utilizing the LightSheer Duet HS hand piece and the LightSheer ET: a comparative study of two diode laser systems in Chinese women. J Cosmet Laser Ther. 2011 Dec;13(6):283-90. doi: 10.3109/14764172.2011.630085. PMID: 22091798.