Proceedings of the 12th International Workshop on Health Text Mining and Information Analysis Eben Holderness editor Antonio Jimeno Yepes editor Alberto Lavelli editor Anne-Lyse Minard editor James Pustejovsky editor Fabio Rinaldi editor 2021-04 Association for Computational Linguistics online text conference publication louhi-2021-international https://aclanthology.org/2021.louhi-1.0/