Published: Mar 02, 2011 1:09 AM EST
Updated: Mar 01, 2011 10:11 PM EST

BONITA SPRINGS, Fla.- A Bonita Springs doctor suspended by the state is defending his practice, saying he saves lives with stem cell treatments. But state investigators say Dr. Zannos Grekos, performed an experimental procedure that went horribly wrong, and left a woman dead.

WINK News sat down with Dr. Grekos to talk about the allegations surrounding his practice. He didn't want to comment on the matter. But he was open about his training and experience. The certified cardiologist says he learned to perform stem cell procedures in Thailand and at the University of Florida.

"The first patient I was involved with was in 2006 and he was treated for a damaged heart due to heart attack," explained Dr. Grekos.

After that Grekos says he wanted to help others both in the United States and internationally. He opened a practice in the Dominican Republic in 2009.

But now the state surgeon general has issued an order of emergency restriction on his license, which prohibits him from performing stem cell procedures. According to a report, Grekos performed an experimental treatment that killed a 69-year-old breast cancer patient. A procedure not authorized nor recognized by the Food and Drug Administration.

WINK News also spoke to some of Dr. Grekos patients who credit him for saving their lives.

"Before stem cells, I couldn't keep up with my friends at school when we were outside and I have to miss some time in the gym," said Cal Abbo, who was diagnosed with a rare lung condition.

"He has basically gave my son his life back," said Cal's mother.

Having his license suspended is not the only problem for Grekos. Court documents obtained by WINK News show some of Dr. Grekos former patients are suing him for malpractice and breach of contract.