Dr. Dawn Chen Current senior R & D scientist at Quest Diagnostics Nichols Institute, where working intensively on protein/peptide assay developments and validations on mass spectrometry based MRM methods in clinical samples. Another interests is studying the correlations between the immunoassay based assay and mass spec based assays. 2003-2009, junior faculty at Johns Hopkins Medical Institute, specialized in proteomics biomarker discoveries and validations.