There are not any programs like this at UCSF. The school has had a liability issue with this ever since a nursing student sued UCLA after he/she was injured on some relief trip (this is something I heard second hand, so don't put too much weight on it). So now the whole UC system is on pins and needles about any sort of international trip being endorsed by the school. Many students from UCSF have done international work. The catch is you just cannot be endorsed by UCSF; you must go through another avenue (like Flying Doctors).