New Releases from NCBI BookshelfEvidence reviews for effectiveness of different thresholds or criteria for starting treatment for non-proliferative diabetic retinopathy, proliferative diabetic retinopathy, and diabetic macular oedema: Diabetic retinopathy: management and monitoring: Evidence review B.​Evidence reviews for effectiveness of different thresholds or criteria for starting treatment for non-proliferative diabetic retinopathy, proliferative diabetic retinopathy, and diabetic macular oedema: Diabetic retinopathy: management and monitoring: Evidence review B.