There is a traditional antagonism between MDs whose specialties extend into common ground with other specialists. This should not be seen as a problem for you, because everyone--in your practice and theirs--contributes to the bottom line. You have to present yourself as being open-minded, because more innovations are being developed and introduced all the time. Gone are the days when a specialty can claim dominance over an area of expertise that is a "gray area" intersection between two specialties.