title: Using blue gel pen to mark freckles during Q-switched laser therapy.
authors: Xiu-jun
authors: XJ
authors: Liu
authors: Meng-hua
authors: MH
authors: Huo
mesh_terms: D005782:Gels; D006801:Humans; D028022:Low-Level Light Therapy / Q000379:methods*; D008548:Melanosis / Q000175:diagnosis* / Q000532:radiotherapy*
chemical_list: D005782:Gels