The DRCR.net25 reported 3 cases of endophthalmitis out of a total of 3973 injections (0.08%) in ranibizumab arms. The RISE and RIDE studies,13 taken together, reported a total of 4 endophthalmitis cases among a total of 10 584 injections administered. In the current study, all injections were performed in an ambulatory operating room, following recommended aseptic practices.17, 18, 19 and 20 The relatively high endophthalmitis rate in our study may be related to patient-related characteristics, such as poor socioeconomic status and hygiene habits.17

Finally, administering anti-VEGF to both eyes may increase the risk of systemic complications; GSK-3 inhibitor in fact, 1 of these patients had transient increase in creatinine levels during the study. In sum, in the current study, IV bevacizumab and IV ranibizumab were associated with improvement in mean BCVA and mean central subfield thickness in patients with center-involved DME at 48 weeks of follow-up when compared with baseline. Eyes in the IV bevacizumab group received a significantly higher number of injections than eyes in the IV ranibizumab group. During the study, eyes in the IV ranibizumab group experienced a faster recovery of BCVA compared with eyes in the IV bevacizumab group, which may be explained by the higher proportion of eyes in the IV ranibizumab group with a central subfield thickness <275 μm at intermediate-term study

follow-up visits. To our knowledge and based on a Medline search, this is the first report comparing IV bevacizumab and IV ranibizumab for the treatment of DME. The current see more study is limited by a small sample size; larger prospective studies are warranted to confirm our preliminary findings. All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Rodrigo Jorge

received travel support from Novartis to attend the 2012 American Society of Retina Specialists (ASRS) meeting. This study was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP), grant number 2010/013368; and Fundação Apoio ao Ensino, Pesquisa e Assistência (FAEPA) do Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo. Contributions of authors: conception and design of the study (I.U.S., Non-specific serine/threonine protein kinase A.M., R.C.S., R.J.); analysis and interpretation (A.B.N., E.T., F.P.P.A., R.P., R.C.S., J.A.C., A.M., I.U.S., R.J.); writing the article (A.B.N., E.T., F.P.P.A., R.P., J.A.C., A.M., I.U.S., R.J.); critical revision (A.B.N., J.A.C., R.C.S., I.U.S., A.M., R.J.); final approval of the article (A.B.N., E.T., F.P.P.A., R.P., R.C.S., J.A.C., A.M., I.U.S., R.J.); data collection (A.B.N., E.T., F.P.P.A., R.P., R.C.S.); provision of materials (A.B.N., E.T., F.P.P.A., R.P., R.C.S., J.A.C., R.J.); statistical analysis (A.M., R.J.); obtaining funding (A.B.N., E.T., A.M., R.J.); literature search (A.B.N., E.T., R.C.S., I.U.S., R.J.