Straight to fellowship.. Can i do it?

[HPCM]

Hi!
I am a 32yo MD, PhD, a good publication track, and now doing 5y residency in Allergy/Clinical Immunology in Europe.
After residency I would be very much interested in a 2-3year fellowship in a good US research university.
What are my options?

Can i just skip US Residency?
I really dont want to do 3 more years residency..

I gather I will have to do USMLE 1, 2, 3, but then which "board"/"comission" is responsible for validating foreign residencies?
Can i apply for Allergy/Clinical Immunology Board examinations straight after USMLEs?

Advice would be much appreciated!