JM Raya Sanchez, HA Arguelles, ML Brito Barroso, and LH Nieto. 2001. “Bone Marrow Fibrin-Ring (doughnut) Granulomas and Peripheral T-Cell Lymphoma: An Exceptional Association”. Haematologica 86 (1). Pavia, Italy, 112-12. https://haematologica.org/article/view/1908.