Norway's Crown Princess Mette-Marit, who was diagnosed in 2018 with a rare form of pulmonary fibrosis causing respiratory difficulties, has undergone a "successful" lung transplant. The royal house announced this. "We are pleased that everything has progressed well so far. In accordance with standard practice for all recent transplant recipients, Her Royal Highness the Crown Princess will remain hospitalized at Oslo University Hospital Rikshospitalet for several weeks," said Are Holm, a lung specialist at the hospital, quoted in the palace's statement. Mette-Marit's condition had significantly worsened in the last six months, and her doctors had announced on June 5 that the 52-year-old had been placed on the waiting list for a lung transplant.