About the Authors

Adam Schayowitz

Affiliation BioMarker Strategies, Baltimore, Maryland, United States of America

Greg Bertenshaw

Affiliation BioMarker Strategies, Baltimore, Maryland, United States of America

Emiko Jeffries

Affiliation BioMarker Strategies, Baltimore, Maryland, United States of America

Timothy Schatz

Affiliation BioMarker Strategies, Baltimore, Maryland, United States of America

James Cotton

Affiliation BioMarker Strategies, Baltimore, Maryland, United States of America

Jessie Villanueva

Affiliation Melanoma Research Center, The Wistar Institute, Philadelphia, Pennsylvania, United States of America

Meenhard Herlyn

Affiliation Melanoma Research Center, The Wistar Institute, Philadelphia, Pennsylvania, United States of America

Clemens Krepler

Affiliation Melanoma Research Center, The Wistar Institute, Philadelphia, Pennsylvania, United States of America

Adina Vultur

Affiliation Melanoma Research Center, The Wistar Institute, Philadelphia, Pennsylvania, United States of America

Wei Xu

Affiliation Abramson Cancer Center, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America

Gordon H. Yu

Affiliation Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America

Lynn Schuchter

Affiliation Abramson Cancer Center, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America

Douglas P. Clark

dpclark@biomarkerstrategies.com

Affiliation BioMarker Strategies, Baltimore, Maryland, United States of America

Competing Interests

Authors DPC, AS, GB, EJ, TS, JC are paid employees of BioMarker Strategies, each with equity stake in the private commercial company. DPC is a co-founder and a member of the Board of Directors of BioMarker Strategies. BioMarker Strategies manufactures the SnapPath platform, a research use only instrument. The Company is currently engaged in the patent prosecution of three applications (U.S. Serial #: 13/089,219; 12/258,251; and 12/125,790). Authors LS and WX have received research support from BioMarker Strategies. This does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: DPC AS GB LS GHY MH JV. Performed the experiments: EJ TS JC. Analyzed the data: DPC AS GB EJ TS JC JV AV CK MH WX GHY LS. Contributed reagents/materials/analysis tools: AS GB EJ TS JC JV AV CK MH WX GHY LS. Wrote the paper: DPC.