1. Gorevic PD, Kassab H J and Levo Y: Mixed cryoglobulinemia: Clinical aspects and long term follow up of 40 patients. Am J Med 69: 287–308, 1980.
2. Tarantino A, De Vecchi A, Montagnino G, Imbasciati E, Mihatsch MJ, Zollinger HU, Barbiano Di Belgiojoso, Busnach G and Ponticelli C: Renal disease in essential mixed cryoglobulinemia. Long term follow up of 44 patients. Quart J Med NSL 197: 1–30, 1981.
3. Invernizzi F, Galli M, Serino G, Monti G, Meroni PL, Granatieri C and Zanussi C: Secondary and essential cryoglobulinemias. Frequency nosological classification and long-term follow up: Acta Haematol (Basel) 70: 73–82, 1983.
4. D’Amico G, Ferrario F, Colasanti G and Bucci A: Glomerulonephritis in essential mixed cryoglobulinemia Proc Eur Dial Transplant Assoc Eur Ren Assoc 21: 527–548, 1985.
5. Verroust P, Mery JPh, Morel-Maroger L, Clauvel JP and Richet G: Les lésions gloméru- laires des gammapathies monoclonales et des cryoglobulinémies idiopathiques IgG-IgM: Act Nephrol Hôpital Necker (Flammarion Ed): 167–202, 1971.