diagnostics Article DR-NASNet: Automated System to Detect and Classify Diabetic Retinopathy Severity Using Improved Pretrained NASNet Model Muhammad Zaheer Sajid 1 , Muhammad Fareed Hamid 2, Ayman Youssef 3 , Javeria Yasmin 1, Ganeshkumar Perumal 4, Imran Qureshi 4, Syed Muhammad Naqi 5 and Qaisar...