1. University of Birmingham; Birmingham Clinical Trials Unit; Edgbaston Birmingham UK B15 2TT
2. College of Medicine and DentalSciences; School of Clinical and Experimental Medicine; University of Birmingham Edgbaston Birmingham West Midlands UK B18 7QH
3. University of East Anglia; Edith Cavell Building; Norwich UK NR4 7TJ
4. Leiden University of Medical Center; Department of Neurology; Albinusdreef 2 Leiden Netherlands 2333 ZA
5. University of Birmingham; Cancer Research UK Clinical Trials Unit, School of Cancer Sciences; Edgbaston Birmingham UK B15 2TT
6. The University of Birmingham; Clinical Trials Unit; Robert Aitken Institute for Clincial Research College of Medical Sciences Birmingham UK B15 2TT