ISUOG Practice Guidelines (updated): use of Doppler velocimetry in obstetrics. (19th July 2021) - Bhide, A.; Acharya, G.; Baschat, A.; Bilardo, C. M.; Brezinka, C.; Cafici, D.; Ebbing, C.; Hernandez‐Andrade, E.; Kalache, K.; Kingdom, J.; Kiserud, T.; Kumar, S.; et al.