I applied in-person. I interviewed at Abbott (Chicago, IL) in May 2011
Interview
Just one phone interview; the hiring manager called me, asking me to briefly introduce my research projects (I'm a PhD student), and we discussed a little on the projects I just described. Then I asked about the details of the intern position, like what exactly I'm supposed to do, the stating date, payment, etc.
Interview questions [1]
Question 1
He didn't ask me any unexpected/hard question, but I was surprised that he can raise some good point in my own research project.