Add medical tag and preprint

Hey Eric! Adding the `medical` tag as well as a link to the preprint so that people in the community can find your model more easily.

README.md

@@ -1,5 +1,7 @@
 ---
 license: mit
+tags:
+- medical
 ---
 
 # Clinical-T5 Models
@@ -8,6 +10,8 @@ We train four different T5 variants on the union of MIMIC-III and MIMIC-IV: (1)
 
 This particular model card describes the T5-Large model trained from scratch on MIMIC notes.
 
+More information about the models and training procedure can also be found in the [preprint](https://arxiv.org/abs/2302.08091).
+
 # Model Pretraining 
 In this section, we will describe the pretraining procedure.