Although personally the idea is somewhat revolting to me to do a bunch of medicine, I do know that some programs (mine included) will allow you to combine the two and do it in five years. Our Medicine Chair allows you to start a continuity clinic in your intern year and keep it up during your Anesthesia training if you so choose. You then do one more year of mostly medicine after your CA-3 then are (purportedly) eligible to sit for your IM boards. This plan was pitched to many of us when interviewing at my school for a Prelim Medicine year. The offer only stood if we stayed at the home program for Anesthesia training.
His (Medicine Chair's) reasoning is that it's the continuity clinic aspect that keeps most people from being double-boarded in IM and Anesthesia and by allowing you to keep the clinic throughout training you are still keeping options open. According to people I've talked to about this, it is appealing to people who want to do Anesth/IM/CC. I'm not sure I totally understand the appeal, but I have heard that there have been several people do this over the years.
This post has nothing to do with Meyers-Briggs. But kudos to Lord Jeebus for knowing that stuff. Impressive. 👍 I generally find those types of tests to have a high male bovine fecal content as well.