1. University of Birmingham; University of Birmingham Clinical Trials Unit; Division of Medical Sciences, Robert Aitken Institute Edgbaston Birmingham UK B15 2TT
2. City Hospital, Sandwell and West Birmingham Hospitals NHS Trust; Department of Neurology; Dudley Road Birmingham West Midlands UK B18 7QH
3. Leiden University of Medical Center; Department of Neurology; Albinusdreef 2 Leiden Netherlands 2333 ZA
4. Faculdade de Medicina de Lisboa; Laboratório de Farmacologia Clínica e Terapêutica; Hospital de Santa Maria Av. Prof. Egas Moniz Lisboa Portugal 1649-028
5. Robert Aitken Institute University of Birmingham; Birmingham Clinical Trials Unit - Division of Medical Sciences; Edgbaston Birmingham UK B 15 2 TT
6. The University of Birmingham; Clinical Trials Unit; Park Grange 1 Somerset Road Edgbaston Birmingham UK B15 2RR