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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 20 February 2015; Accepted 17 March 2015; Accepted Manuscript published 17 March 2015; Advance Article published 23 March 2015; Version of Record published 21 April 2015