UK Biobank: an Open Access Resource for Identifying the Causes of a Wide Range of Complex Diseases of Middle and Old AgeCathie Sudlow,John Gallacher,Naomi Allen,Valerie Beral,Paul Burton,John Danesh,Paul Downey,Paul Elliott,Jane Green,Martin Landray,Bette Liu,Paul Matthews,Giok Ong,Jill Pell,Alan Silman,Alan Young,Tim Sprosen,Tim Peakman,Rory Collins