International Journal of Molecular Sciences Review Lymphatic Vascular Structures: A New Aspect in Proliferative Diabetic Retinopathy Erika Gucciardo 1,* , Sirpa Loukovaara 2,*, Petri Salven 3 and Kaisa Lehti 1,4 1 Research Programs Unit, Genome-Scale Biology, Biomedicum Helsinki, University of ...