- Correspondence to James R F Hockley, Department of Pharmacology, University of Cambridge, Cambridge, UK; and Dr Ewan St John Smith, Department of Pharmacology, University of Cambridge, Cambridge CB1 2PD, UK;
- Received 12 November 2017
- Revised 2 February 2018
- Accepted 10 February 2018
- Published online 26 February 2018.
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