1. Department of Obstetrics and Gynecology, University of Torino, Torino, Italy.
2. Romagna Cancer Registry, Romagna Cancer Institute (IRST) IRCCS, Meldola, Forlì, Italy.
3. Department of Pathology and Cytology of Female Cancer, Childhood Cancer, and Rare Cancers, AOU Città della Salute e della Scienza, Torino, Italy.