I'm an older applicant (31) and have been out of school for 6 years. I'm looking for suggestions as to who to obtain letters of rec from. I work in science and can get great recs form my Ph.D. employers but I imagine I should get a letter from a D.O. or M.D. I've shadowed docs but nothing extensive enough to gain a good personal letter. I volunteer in the community and wonder if a letter of rec from someone who has seen me work with might be better. Thanks.