Association of the presence of a COVID-19 infection at the time of birth and the rates of exclusive breastfeeding upon discharge in BFHI hospitals: a multicenter, prospective cohort study - Marín Gabriel MÁ; Martín Lozoya S; de las Heras Ibarra S; Domingo Comeche L; González Carrasco E; Lalaguna Mallada P; Villó Sirerol N; García Fernández L; Jiménez Martínez J; Royuela Vicente A (International Breastfeeding Journal, 2023)