External validation and calibration of the HoLISTIC Consortium s advanced-stage Hodgkin lymphoma international prognostic index (A-HIPI) in the Brazilian Hodgkin lymphoma registry - Buccheri, Valéria; Moreira, Frederico Rafael; Biasoli, Irene; Castro, Nelson; Villarim, Carolina Colaço; Traina, Fabiola; Silveira, Talita; Praxedes, Monica Kopschitz; Solza, Cristiana; Perobelli, Leila; Baiocchi, Otavio; Gaiolla, Rafael; et al. (British Journal of Haematology, 2025)