Final answer:
Dr. Ezchowitz and the associated agreement with Mass General cannot be identified without additional context; accordingly, an accurate answer cannot be provided.
Step-by-step explanation:
Without additional context, it is not possible to determine who Dr. Ezchowitz is or what Mass General (which likely refers to Massachusetts General Hospital) agrees to do. This name does not immediately correspond to a widely recognized figure in any academic field or a publicly known professional associated with Massachusetts General Hospital. It is possible that Dr. Ezchowitz is a fictional character in a book, television show, or a scenario from a class assignment. Such details, including the actions agreed upon by Mass General, are likely specific to the context in which they are mentioned, and without that context, an accurate and helpful answer cannot be provided.