2 suggestion for your son:1.looking the key person to chose a resident and web search this person's articles and pamphlet; 2.do not overlook the little guys involved in interview--sometimes they prick the ball. also,in uw most department usually looking the applicant's scientific back ground. if he is applying for small dept usually they made choice before grant a interview. that means most of the applicant just get a free meal-- this is very useful for consideration on match ranking list.