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IDENTIFIERS

: Eugene P. Petrov (ORCID)

: Eugene P. Petrov (ResearcherID)

: Ralf Metzler (ORCID)

COPYRIGHT AND LICENSING

: The Royal Society of Chemistry has an exclusive publication licence for this journal

OPEN ACCESS: This article is freely available. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0)

PUBLICATION HISTORY

: Received 3 July 2016; Accepted 28 July 2016; Accepted Manuscript published 28 July 2016; Advance Article published 5 August 2016; Version of Record published 28 September 2016