TY - STAND AU - J. Hippisley-Cox AU - C. Coupland AU - P. Brindle BT - BMJ Open DO - 10.1136/bmjopen-2014-005809 M1 - 8 PY - 2014 EP - e005809 T2 - BMJ Open TI - The performance of seven QPrediction risk scores in an independent external sample of patients from general practice: a validation study VL - 4 SN - 2044-6055 ER -