1. University Hospital Città della Salute e della Scienza, Turin, Italy (C.S., E.R., P.A., N.S.)
2. IRCCS Ospedale Policlinico San Martino, Genoa, Italy (L.B., S.S., C.C.)
3. ISPRO, Florence, Italy (M.Z., C.B.V.)
4. FPO-IRCCS Candiolo Cancer Institute,Turin, Italy (A.A.)
5. IRCCS European Institute of Oncology, Milan, Italy (C.C.)
6. Romagna Cancer Registry, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) “Dino Amadori,” Meldola, Forlì, Italy (F.F., O.G.)
7. Infermi Hospital, Biella, Italy (F.F.)
8. Mauriziano Umberto I Hospital, Turin, Italy (M.F.)
9. FPO-IRCCS Candiolo Cancer Institute, Turin, Italy (M.R.)
10. Agency for Health Protection of the Metropolitan Area of Milan, Milan, Italy (A.G.R.)
11. Piedmont Cancer Registry, University Hospital Città della Salute e della Scienza, Turin, Italy (S.R.).