%0 Journal Article %T Quantitation of eumelanin and pheomelanin markers in diverse biological samples by HPLC-UV-MS following solid-phase extraction %A Affenzeller, Susanne %A Frauendorf, Holm %A Licha, Tobias %A Jackson, Daniel J. %A Wolkenstein, Klaus %J PLoS ONE %V 14 %N 10 %D 2019-10-17 %I Public Library of Science %~ DeepDyve