I applied through college or university. The process took 2 months. I interviewed at Cornell University (Ithaca, NY) in Nov 2011
Interview
Found an advert on the university website and applied.I was invited for an interview with the prospective supervisors and subsequently a panel of interviewers.After a few weeks I received an offer letter by email and then by post.All the interviews were held on the university campus and the interviewers were well prepared.