Does anyone know where I can find rotations in under-developed nations for M4 year? I am trying to decide on whether I should go into a specialized field like Rads or more general like ER so that I can devote my life to helping those with nothing.

I hear you can do rotations in the United States.

Pick a country, then find a teaching hospital

really the previous poster is right, pick any country. I like this program though:

http://www.healthfrontiers.org/Projects/Laos/laos.htm

They have rotations in IM or pedi. I am going next year, but everyone I know who has gone loved it.

Thailand has lots of rotations at most of their teaching hospitals: Mahidol, Chulalongkorn, Chiang Mai

Singapore ... not really underdeveloped, but I spent a month there and thought it was fabulous

Makerere University in Uganda takes people from here as well.

You can try the website of the global health consortium
http://www.globalhealth-ec.org/