I'm a MD/PhD reapplicant and most of my hours for ECs/volunteering/shadowing came from 2009-2010. I am going to do research for NIH for a year and reapply for the 2013 cycle. Will all my past work be too old by the time I apply again? I will continue to volunteer and such but I want to know if the past hours I did will be considered too old to combine with my new upcoming hours.