Natalie Cole undergoes kidney transplant

"Ms. Cole's physicians have advised her to postpone her summer tour dates as she recuperates for the next three to four months," the statement said.
"Further information about the re-scheduled dates will be available shortly."
Cole was diagnosed in February 2008 with hepatitis C -- a condition she attributed to her past battles with drug addiction -- and has been undergoing kidney dialysis three times a week since September.
Cole, the daughter of legendary crooner Nat King Cole, told CNN earlier this year she was receiving aggressive chemotherapy to battle the hepatitis.
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