Rossella R. Cacciola et al. 2021. Study on the of Anagrelide on Platelet Factor 4 and Vascular Endothelial Growth Factor Levels in Patients with Essential Thrombocythemia. Recent Developments in Medicine and Medical Research Vol. 4. (Oct. 2021), 162–165. DOI:https://doi.org/10.9734/bpi/rdmmr/v4/1936C.