Research needed (?) for general surgery

I am currently a 2nd-year premed student in a 7-year BS/MD program and contemplating to go to specialty of trauma surgery, so I start looking for appropriate research opportunities at near-by medical school campus. I have couple questions for all the more experienced members on SDN.

1. for a mid-tier general surgery residency program, do most applicants have research experience and/or publication by the time of MS3?
2. should I look for research project only related to general...

Research needed (?) for general surgery