Like Father, Like Son, Like Son's Friend From College

Big thanks to Chris, who provided these elucidative answers to my House queries:

1) Head of the Department of Diagnostic Medicine, and infectious disease specialist, and nephrologist
2) It's in Jersey. I don't know
3) It's Princeton General, yes, it's real (at least within the reality of 'House')
4) He's fairly insulated due to his near flawless record
5) He's addicted to Vicodin due to nerve damage in his leg
6) He accounts for over half of the lawsuits in the hospital, but he's also one of the most respected MDs in his field, which leaves the hospital open for grants and also gives them a higher success rate