The DiPEP (Diagnosis of PE in Pregnancy) biomarker study: an observational cohort study augmented with additional cases to determine the diagnostic utility of biomarkers for suspected venous thromboembolism during pregnancy and puerperium - Hunt, B J; Parmar, K; Horspool, K; Shephard, N; Nelson-Piercy, C; Goodacre, S; DiPEP Research Group (Br J Haematol, 2018)