. . "Only time will tell.The HIV virus may be hiding in other organs such as the liver, spleen or brain and could return months later, he warned.Further testing of the men's cells, plasma and tissue for at least a year will help give a clearer picture on the full impact of the transplant on HIV persistence, he said.Kuritzkes said the patients will be put back on the drugs if there is a viral rebound.A" . . .