Conversation so far:
What happened in Gregory Hemingway's middle years?
Gregory's fourth marriage, to Ida Mae Galliher, ended in divorce in 1995 after three years, though they continued to live together and remarried in 1997.
Do we know why Gregory Hemingway had so many marriages?

Question: Where did he go to medical school?
Self-contained rewrite: Where did Gregory Hemingway go to medical school?