Ditto the others ... a good reason is key. I deferred UMDNJ-SOM to do an additional year of research prior to entering school. Also, if you've been away from school/academia/science for some time, even a year, they (UMDNJ-SOM) may require their summer pre-matriculation program. My situation does not require attending the summer program. Check with the individual schools you are interested in for their requirements.