Chennai's Siddharth has become the country's youngest patient to successfully undergo a complete liver transplant. Doctors at Delhi's Sir Gangaram Hospital, who conducted the operation on 11-month-old Siddharth, say he beat the earlier record held by Pakistani national Shreyar. A resident of Karachi, Shreyar was one-year-old when he underwent the liver transplant in 2006 in the same hospital.