Cardiovascular surgeon Juan Esteban de Villarreal pulls a portable fridge containing a donor's heart to be implanted in a patient at Puerta de Hierro University Hospital in Majadahonda, near Madrid . - For a time-critical procedure that is heavily reliant on intensive care, the Covid pandemic and its explosion of desperately-ill patients has thrown up a barrage of complexities which Spain's world leading organ transplant experts have been forced to surmount. (Photo by JAVIER SORIANO / AFP) / THIS PICTURE MUST BE PUBLISHED UNDATED AT THE REQUEST OF THE HOSPITAL - TO GO WITH AFP STORY "For transplants, Covid complicates the race against time" by MARIE GIFFARD (Photo by JAVIER SORIANO/AFP via Getty Images)
