I'm torn on which third LOR to send and would appreciate any suggestions. Thanks!
One option is from a surgeon and mentor in my desired field who I have shadowed for three years; I know this letter is really good.
The other option is from a clinic that I currently work at where I run the vaccine clinic; I asked my boss and a provider to co-sign it, but everyone got excited about it and jumped on it - CEO, COO, CMO, providers, etc. I have no idea how they ended up putting the final product together.