Early cryoprecipitate transfusion versus standard care in severe postpartum haemorrhage: a pilot cluster‐randomised trial - Green, L.; Daru, J.; Gonzalez Carreras, F. J.; Lanz, D.; Pardo, M. C.; Peŕez, T.; Pérez, T.; Philip, S.; Tanqueray, T.; Khan, K. S.; Bhogal, S.; Crowe, S.; et al. (Anaesthesia: Peri-operative medicine, critical care and pain, 2021)