|Home | About | Journals | Submit | Contact Us | Français|
The original article  contained an error in the title whereby the word ‘of’ was mistakenly inserted between ‘independent’ and ‘active’ during the article’s production.
As such, the original article title has now been updated to reflect the correct title.
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
The online version of the original article can be found under doi:10.1186/s12867-017-0087-y.