Adrianzén, R.E. et al. 2019. Frequency and severity of diabetic retinopathy in patients with type 2 diabetes mellitus at the Regional Institute of Ophthalmology. Revista Peruana de Medicina Experimental y Salud Pública. 36, 2 (Jun. 2019), 260–4. DOI:https://doi.org/10.17843/rpmesp.2019.362.4076.