I don't understand the whole IM residency route. If one can't match straight into the residency one wants, one can go through a IM residency and match into something else after completing it? Will that be considered 2 residencies or a residency and a fellowship? How does it work? For example, if one can't match into a surgical residency, does one have to do an IM residency first then try to get into the surgical residency later?