Book ChapterThe Role of Sex Hormones in Diabetic Retinopathy by Jeffery G. Grigsby, Donald M. Allen, Richard B. Culbert, Gerardo Escobedo, Kalpana Parvathaneni, Brandi S. Betts and Andrew T.C. Tsinin the book "Diabetic Retinopathy" edited by Mohammad Shamsul Ola, ISBN 978-953-51-0044-7, InTech, February 2, 2012