Factors Associated with Fluctuations in Central Subfield Thickness in Patients with Diabetic Macular Edema Using Diabetic Retinopathy Clinical Research Protocols T and V oleh Ava Torjani, BA, Raziyeh Mahmoudzadeh, MD, Mirataollah Salabati, MD, Louis Cai, MD, Jason Hsu, MD, Sunir Garg, MD, Allen C. Ho, MD, Yoshihiro Yonekawa, MD, Ajay E. Kuriyan, MD, MS, Matthew R. Starr, MD