I have a degree in marketing and am a medical journal published author. I primarily write of conflicts of interest when establishing public health policies, for the purpose of misleading US courts to deny liability for causation of illness, injury and death.
The subject matter can be very complex and diverse. It takes many twists and turns. It involves physicians, scientists, medical schools, "non-profit" medical associations, jurists, attorneys, expert witnesses, politicians, think-tanks, lobbyists, political action committees, insurers, government agencies, and loads of taxpayer defrauding.