I have had friends in this situation. The answer is no-- you are required to travel back to the States for interviews. If you can schedule them all in, say, a two-week period around Christmas or Thanksgiving, that is quite in keeping with the overseas residency requirements of the Fulbright and you'll be fine. It's my impression that IM and peds programs tend to be quite flexible in this regard and offer multiple interview dates. Just get everything in super-early so you'll have the leverage to schedule interviews when you wish.