P1646: PRIMARY IMMUNE THROMBOCYTOPENIA (ITP) IN PATIENTS OLDER THAN 75 YEARS: REAL WORLD DATA FROM THE ITP REGISTRY OF THE HELLENIC SOCIETY OF HEMATOLOGY. (23rd June 2022) - Pontikoglou, C.; Matheakakis, A.; Stavroulaki, E.; Chatzilygeroudi, T.; Kourakli, A.; Symeonidis, A.; Dimou, M.; Panayiotidis, P.; Drakos, G.; Koudouna, A.; Galanopoulos, A.; Kaliafentaki, V.; et al.