Information on the various disciplines and study locations can be found here.
Further information can also be found in the FAQ section.
The respective university, rather than swissuniversities, is responsible for changing subjects between the various medical degree programs once enrolment has been completed. In certain cases, timely registration with swissuniversities is necessary in order to take a qualifying examination. However, there is no centralized allocation of study places for this purpose. If you have any questions in this regard, please contact the university in question.