About the Authors
Institute for Ethnomedicine, Jackson, Wyoming, United States of America
Department of Analytical Chemistry, Stockholm University, Stockholm, Sweden
Craighead Beringia South, Kelly, Wyoming, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: SAB JSM PAC. Performed the experiments: SAB JSM LJ LLI. Analyzed the data: SAB JSM LJ LLI. Contributed reagents/materials/analysis tools: SAB JSM DC PAC. Wrote the paper: SAB JSM LLI PAC.