Perbandingan Pengetahuan, Sikap, dan Perilaku Pasien Diabetes Melitus dengan Retinopati Diabetik terhadap Pasien Diabetes Melitus tanpa Retinopati Diabetik di Puskesmas Provinsi DKI Jakarta = Comparison of Knowledge, Attitudes, and Practice of Diabetic Mellitus Patients with Diabetic Retinopathy to Diabetes Mellitus Patients without Diabetic Retinopathy at DKI Jakarta Provincial Health Center