I am really scared as I heard that if you do externships through companies, PD dislike it and will refuse your LOR and application? Plz help!Residency programs will value you more if you have US Clinical Experience. Such as a USCE would be better in the form of externship hands-on experience than just observerhip shadowing.
However, observership shadowing is also OK and better than nothing.
Observership itself is better to be in a teaching hospital than to be in a private clinic.
And the private clinic observership would better be with an attending from different ethnicity than yours. But that's not a very big issue.
So if you don't have another choice, yes go and do it. It's certainly better than nothing