The Angio-Fibrotic Switch of VEGF and CTGF in Proliferative Diabetic Retinopathy Kuiper, Esther J. ; Van Nieuwenhoven, Frans A. ; de Smet, Marc D. ; van Meurs, Jan C. ; Tanck, Michael W. ; Oliver, Noelynn ; Klaassen, Ingeborg ; Van Noorden, Cornelis J. F. ; Goldschmeding, Roel ; Schlingemann, Reinier O. Abstract Publication: PLoS ONE Pub Date: July 2008 DOI: 10.1371/journal.pone.0002675 Bibcode: 2008PLoSO...3.2675K