1. Pharmacology and Clinical Pharmacology, St George's Hospital Medical School, Cranmer Terrace, London SW17 0RE, UK
2. Institute of Experimental Pharmacology, Slovak Academy of Sciences, Dúbravská cesta 9, SK‐842 16 Bratislava, Slovak Republic
3. Image Resource Facility, Department of Basic Medical Sciences, St George's Hospital Medical School, Cranmer Terrace, London SW17 0RE, UK