New Delhi, Nov. 29 -- A rare double transplant surgery at a private city hospital gave a new lease of life to a 12-year-old boy from Sudan.Mukhtar Ahmed Ali Gadkarim was suffering from a rare disorder known as Primary Hyperoxaluria, in which levels of oxalate increases in the blood because of an enzyme deficiency in the liver. High levels of oxalate then damages kidney, eyes, bones and other ...