Convolution 2 Convolution neural network 2 Convolutional networks 2 Convolutional neural networks 2 Deep learning 2 Graph neural networks 2 Graphic methods 2 Neighbourhood 2 Pneumonia detection 2 Principal neighborhood aggregation 2 Property 2 Single layer 2 Transfer learning 2 X-ray image 2 convolution neural network 2 graph neural network 2 pneumonia detection 2 principal neighborhood aggregation transfer learning 2