Risk factors for oxygen requirement in hospitalized pregnant and postpartum women with COVID-19 - Baptista, Fernanda Spadotto; Paganoti, Cristiane Freitas; Gomez, Ursula Trovato; Peres, Stela Verzinhasse; Malbouisson, Luiz Marcelo; Brizot, Maria de Lourdes; Francisco, Rossana Pulcineli Vieira (Clinics, 2022)