C Jagger, R Matthews, J Lindesay, T Robinson, P Croft and C. Brayne
Age and Ageing 38 ( 3 ): 319 - 325 , 2009
D Seidel, C Jagger, C Brayne, F. E Matthews and M. CFAS
Age and Ageing 38 ( 6 ): 663 - 668 , 2009