Hydrophobic acrylic versus heparin surface-modified polymethylmethacrylate intraocular lens: a biocompatibility study. - Tognetto,D.; Toto,L.; Minutola,D.; Ballone,E.; Nicola,M di.; Mascio,R Di.; Ravalico,G. (Graefe's Arch Clin Exp Ophthalmol, 2003)