There were errors in the Author Contributions section. A correct version of the section is available below.
Conceived and designed the experiments: FZ M.Lazzerini. Performed the experiments: FZ JAOG AC M.Lonardi MS PP DG CG. Analyzed the data: M.Lazzerini FZ. Contributed reagents/materials/analysis tools: FZ M.Lazzerini TN. Wrote the paper: M.Lazzerini, FZ.
Footnotes
Competing Interests: No competing interests declared.