Fertility Preservation for Patients with Malignant Disease. Guideline of the DGGG, DGU and DGRM (S2 k-Level, AWMF Registry No. 015/082, November 2017) – Recommendations and Statements for Girls and Women - Dittrich, R; Kliesch, S; Schuring, A (Geburtsh Frauenheilk, 2018)