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Funding statement
This research was supported by a contract from the U.S. Department of Agriculture Forest Service to E&S Environmental Chemistry, Inc. under Contract No. AG-3187-C-09-0029. No official agency endorsement is implied. E&S Environmental Chemistry, Inc. provided support in the form of salaries for authors T.C. McDonnell and T.J. Sullivan, but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Remove constraint Funding statement: This research was supported by a contract from the U.S. Department of Agriculture Forest Service to E&S Environmental Chemistry, Inc. under Contract No. AG-3187-C-09-0029. No official agency endorsement is implied. E&S Environmental Chemistry, Inc. provided support in the form of salaries for authors T.C. McDonnell and T.J. Sullivan, but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.