S281: PRIOR EXPOSURE TO IMMUNOSUPPRESSIVE AGENTS AND COMORBIDITIES ARE ASSOCIATED WITH WORSE OUTCOMES OF SARS-COV2 INFECTION IN PH-NEG CHRONIC MYELOPROLIFERATIVE NEOPLASMS: RESULTS... by M. Marchetti, J. Salmanton-García, S. El-Ashwah, M. V. Sacchi, F. Marchesi, Z. Ráčil, M. Hanakova, G. Zambrotta, L. Verga, F. Passamonti, F. Itri, J. Van Doesum, S. Martìn-Pérez, A. López-García, J. Dávila-Valls, R. Cordoba, G. Abu-Zeinah, G. Dragonetti, C. Cattaneo, V. Bonuomo, L. Prezioso, A. Glenthøj, F. Farina, R. Duarte, O. Blennow, O Cornely, L. Pagano

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