second lecture of the year: acute kidney injury

This is a significant upgrade from the version I posted a couple of years ago. I put the lecture together right before the ATN trial was published. I finally got around to updating the presentation to include that data. I also updated the NGAL section and added some data on avoiding volume overload.

I used a number of the posts on the blog to allow me to rapidly update the presentation. I was pleased with how well my ATN commentary/review stood up.