External validation of prognostic models to predict stillbirth using International Prediction of Pregnancy Complications (IPPIC) Network database: individual participant data meta-analysis

J. Allotey, R. Whittle, K. I.E. Snell, M. Smuk, R. Townsend, P. von Dadelszen, A. E.P. Heazell, L. Magee, G. C.S. Smith, J. Sandall, B. Thilaganathan, J. Zamora, R. D. Riley, A. Khalil, S. Thangaratinam, the IPPIC Collaborative Network, M. Makrides