- Correspondence to Dr Martina Zimmermann, Department of Pharmacology, School of Pharmacy, Biocentre N260, Max-von-Laue Str. 9, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany;
- Accepted 26 February 2012
- Published in print 1 December 2012.
- Published online 29 November 2012.
- Published first 19 April 2012.
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