Editor's note: Since the FBI arrested a Brooklyn businessman in late July on federal charges of organ trafficking, CNN has been conducting a worldwide investigation into the sale of kidneys using willing donors and willing recipients from China to Israel to the United States. Nick Rosen says he got $20,000 to donate his kidney and lied to the hospital's transplant team. TEL AVIV, Israel (CNN) -- Four years ago, a young, cash-starved Israeli answered an ad in a newspaper for a kidney donor. "I decided I wanted to make a positive change in my life and do something different," Nick Rosen told CNN. "So I saw an ad in the paper and it said, 'Kidney Donor Wanted.' And called the ad in the paper, and they asked me my blood type."
@highlight
CNN investigating what appears to be a widespread black market in human organs
@highlight
Israeli man says he received $20,000 for his kidney
@highlight
He says he lied to the hospital about the money he received
@highlight
10 percent of kidney transplants worldwide are thought to be illegal
Until March 2008, Israeli law allowed @placeholder citizens to go abroad for live organ transplants from non-related donors.
@placeholder investigators are looking intensively at illegal organ trafficking under the new law, the ministry said.