Optical clearing agent combined with hemoporfin-mediated photodynamic therapy for improved efficacy of port-wine stain patients: A pilot study - Jingjing Wen; Yamin Zhang; Zhen Cai; Congcong Wang; Jinjin Zhu; Lianbin Zhang; Jintao Zhu; Yan Li; Juan Tao; Lishao Guo (Chinese Medical Journal)