Nechama Rivlin, President Reuven Rivlin's wife, underwent a further procedure on Wednesday after last week's lung transplant, the Rivlin's office announced."Her condition is stable and her life is not in danger," his office said in a statement. "The procedure was successful and she is currently receiving help breathing, as is normal after a procedure of this kind." Rivlin has been suffering from pulmonary fibrosis for several years, and has been waiting for a long time for a suitable donor to enable her to have a transplant.The tragedy is that with a lung transplant, unlike a kidney transplant, the organ must come from a deceased donor.In March, 19-year-old Yair Yehezkel drowned in Eilat. He was taken to Joseftal Medical Center and then transferred to Soroka Hospital in Beersheba, but doctors were unable to save him. His family donated his organs in the hope of saving several other lives; Nechama Rivlin was one of the recipients.Greer Fay Cashman contributed to this report.