Platelet-derived growth factor ligands and receptors immunolocalized in proliferative retinal diseases. - Robbins,S.G.; Mixon,R.N.; Wilson,D.J.; Hart,C.E.; Robertson,J.E.; Westra,I.; Planck,S.R.; Rosenbaum,J.T. (Invest. Ophthalmol. Vis. Sci., 1994)