Statistics from Altmetric.com
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.
Funding The research was supported by a grant ‘Iuventus Plus’ funded by the Polish Ministry of Science and Higher Education (no. IP2011065171).
Competing interests None.
Provenance and peer review Commissioned; internally peer reviewed.