Placental weight and birth weight to placental weight ratio in monochorionic and dichorionic growth-restricted and non-growth-restricted twins - Souza, Mariângela Alves; Brizot, Maria de Lourdes; Biancolin, Sckarlet Ernandes; Schultz, Regina; Carvalho, Mário Henrique Burlacchini de; Francisco, Rossana Pulcineli Vieira; Zugaib, Marcelo (Clinics, 2017)