1. Rheumatology and Bone Disease Unit, Centre for Genomic and Experimental Medicine, MRC institute of Genetics and Molecular MedicineUniversity of Edinburgh Edinburgh UK
2. Department of PsychologyUniversity of Edinburgh Edinburgh UK
3. Centre for Cognitive Ageing and Cognitive EpidemiologyUniversity of Edinburgh Edinburgh UK
4. Division of PsychiatryUniversity of Edinburgh, Royal Edinburgh Hospital Edinburgh UK
5. Genetics and Genomics DivisionThe Roslin Institute, University of Edinburgh Midlothian UK