About the Authors

Carlos A. Valdez

Affiliations Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, United States of America, Forensic Science Center, Lawrence Livermore National Laboratory, Livermore, California, United States of America

Roald N. Leif

Affiliations Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, United States of America, Forensic Science Center, Lawrence Livermore National Laboratory, Livermore, California, United States of America

Brian P. Mayer

mayer22@llnl.gov

Affiliations Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, United States of America, Forensic Science Center, Lawrence Livermore National Laboratory, Livermore, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CAV BPM. Performed the experiments: CAV BPM RNL. Analyzed the data: CAV BPM RNL. Contributed reagents/materials/analysis tools: CAV BPM RNL. Contributed to the writing of the manuscript: CAV BPM.