Research is definitely not a necessity but it helps, especially when you talk to interviewers that are more inclined towards research more than the clinical side of medicine. But strong clinical experience can also work in a similar way. You seem to convey confidence in your numbers, and that in addition to some unique personal experiences (anything outside of medicine that makes you valuable to a medical school class) and a strong personal statement should get you some interviews. Oh and when you say you have one "hospital experience," I hope that experience was a very good one, because a half-hearted clinical experience doesn't really impress clinicians or other people. Believe me once you get to an interview you are going to realize that the people sitting right across from you have very amazing experiences, and numbers as well. I've seen some people raise a family, go to third world countries, applicants with PhDs, and people writing for popular publications. Similar to UCLAman, my only advice is to not do something because it sounds like something good for an application, but because you have a genuine interest. Admission Committees are good at discriminating between who is genuinely passionate about their work or the tool that is doing stuff to get into medical school. Good luck