Write me a doctoral dissertation examining the systemic drivers of physician burnout in the United States

Write me a doctoral dissertation examining the systemic drivers of physician burnout in the United States, focusing specifically on cardiologists. Include clear research questions, a mixed-methods methodology (MBI surveys and qualitative interviews), and an analysis of structural stressors like 24/7 STEMI call demands, EHR administrative loads, and RVU-driven productivity quotas