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IDENTIFIERS

: Ullrich Steiner (ORCID)

: Ullrich Steiner (ResearcherID)

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)

PEER REVIEW METHOD

: Single-blind

PUBLICATION HISTORY

: Received 24 December 2014; Advance Article published 9 April 2015; Version of Record published 20 July 2015