Choi, Edward, Zhen Xu, Yujia Li, Michael Dusenberry, Gerardo Flores, Emily Xue, and Andrew Dai. “Learning the Graphical Structure of Electronic Health Records With Graph Convolutional Transformer”. Proceedings of the AAAI Conference on Artificial Intelligence 34, no. 01 (April 3, 2020): 606-613. Accessed April 11, 2021. https://ojs.aaai.org/index.php/AAAI/article/view/5400.