Anna-Carin Olin, who for a long period of time has been an Adjunct Professor at Sahlgrenska Academy, has now received a combination position as Professor of Occupational and Environmental Medicine, associated with position as Senior Physician at Sahlgrenska University Hospital. At the heart of her research is a new instrument called PExA (Particles in Exhaled Air) which provides a new method of measuring exactly that, particles in exhaled air. Anna-Carin Olin has developed the method in broad collaboration with other researchers over the past ten years.