Medical research on human beings

Could you please help me to find the advantages and disadvantages of medical research on human beings and identify ethical dilemmas. The study I am doing is on the Tuskegee syphilis study which was the subject of Congressional Hearings in 1973.

What is the difference between persuasion and manipulation

I need informaiton on persuasion and manupulation. Thank you.

How effective is ethical role modeling and mentoring in day to day practice?

How effective is ethical role modeling and mentoring in day to day practice?