32. Tan JC, Garway-Heath DF, Hitchings RA. Variability across the optic nerve head in scanning laser tomography. Br J Ophthalmol. 2003; 87: 557-559

32. Tan JC, Garway-Heath DF, Hitchings RA. Variability across the optic nerve head in scanning laser tomography. Br J Ophthalmol. 2003; 87: 557-559