“…Our understanding of the mechanism concerning the effect of estrogen on skin pigmentation and/or melasma has also been updated (Kim et al., ; Kippenberger et al., ; McLeod et al., ). Recently, novel cellular and molecular mechanisms for skin pigmentation including melasma have been identified in the context of cell‐to‐cell interaction between melanocytes and dermal fibroblasts (Cardinali et al., ; Choi et al., ; Kang et al., ; Kim et al., ,b; Poon et al., ; Shin et al., ; Yamaguchi et al., ) and microRNAs (Dynoodt et al., ; Kim et al., ,b,c).…”