- Correspondence to Dr Martina Zimmermann, Department of Pharmacology, School of Pharmacy, Biocentre N260, Max-von-Laue Str 9, Goethe University Frankfurt am Main, 60438 Frankfurt am Main, Germany;
- Accepted 17 September 2010
- Published in print 1 December 2010.
- Published online 30 November 2010.
- Published first 24 October 2010.
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