transformers safetensors llama text-generation medical small LM instruction-tuned usmle synthetic data conversational arxiv:2404.00376 arxiv:2009.13081 arxiv:2402.18060 arxiv:2203.14371 arxiv:2009.03300 license:cc-by-nc-4.0 autotrain_compatible text-generation-inference endpoints_compatible region:us