Title : The General Practitioner as an investigator 1 Authors : Vishnu B. Madhok, 1 Rustam Al-Shahi Salman, 2 Frank 2 Sullivan. 1 3 Affiliations : 4 1 Division of Population Heath Sciences, University of Dundee, 5 Dundee 6 2 Division of Clinical Neurosciences, Centre for Clinical Brain 7 Sciences, University of 11 Edinburgh, Edinburgh 8 Author for correspondence: Rustam Al-Shahi Salman, Bramwell 9 Dott Building, Division of Clinical Neurosciences, University of 10 Edinburgh, Western General Hospital, Edinburgh. EH4 2XU. UK. 11 email: Rustam.Al-Shahi@ed.ac.uk, tel. +44 (0)131 537 2944 12 13