1. International Agency for Research on Cancer, Lyon, France (I.B., V.T., G.M.C.)
2. Jigme Dorji Wangchuck National Referral Hospital, Thimphu, Bhutan (U.T., T.W.)
3. Amsterdam UMC, Vrije Universiteit Amsterdam, Cancer Center Amsterdam, Amsterdam, the Netherlands (D.A.H.)
4. Centro di Riferimento Oncologico (CRO), IRCCS, Aviano, Italy (S.F.)