About the Authors

Philippa Wiggins

To whom correspondence should be addressed. E-mail: p.wiggins@paradise.net.nz

Affiliation Mairangi Bay, Auckland, New Zealand

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PW. Performed the experiments: PW. Analyzed the data: PW. Contributed reagents/materials/analysis tools: PW. Wrote the paper: PW.