Impact of routine transvaginal ultrasound monitoring of cervical length in twins on administration of antenatal corticosteroids. Marcellin, L.; Senat, M. V.; Benachi, A.; Regis, S.; Cabrol, D.; Goffinet, F.. J Perinat Med. 2017; 45: p.471-477. doi:10.1515/jpm-2016-0102Article