Campos JR, Rosa-e-Silva JC, Carvalho BR, Vireque AA, Silva-de-Sá MF, Rosa-e-Silva ACJ de S. Cryopreservation time does not decrease follicular viability in ovarian tissue frozen for fertility preservation . Clinics. 2011;66(12):2093-2097. doi:10.1590/S1807-59322011001200015