Early versus late switch: How long should we extend the anti-vascular endothelial growth factor therapy in unresponsive diabetic macular edema patients? - Hernandez Martinez, Adrian; Pereira Delgado, Ernesto; Silva Silva, Guillermo; Castellanos Mateos, Luis; Lorente Pascual, Jose; Lainez Villa, Julian; Garcia Vicente, Paula; Almeida-Gonzalez, Carmen-Victoria (EUROPEAN JOURNAL OF OPHTHALMOLOGY, 2020)