Pulmonary embolism in acute lymphoblastic leukemia - An observational study of 1685 patients treated according to the NOPHO ALL2008 protocol - Tuckuviene, R; Bjerg, CL; Jonsson, OG; Langstrom, S; Rank, CU; Ranta, S; Saks, K; Trakymiene, SS; Ruud, E (Research and practice in thrombosis and haemostasis, 2020)