what is the highest paid medical specialist?
['Orthopedic surgery, $526,385.', 'Radiation Oncology, $486,089.', 'Vascular Surgery, $484,740.', 'Dermatology, $455,255.', 'Cardiology, $453,515.', 'Plastic Surgery, $433,060.', 'Gastroenterology, $431,767.', 'Radiology, $428,572.']