Due to the COVID-restrictions the defense is held fully remotely. You are all welcome to follow the defense via Zoom https://helsinki.zoom.us/j/69674151049?pwd=b3IweXU2N1pMSXBkSXVxeVp1aGRlZz09 (meeting ID: 696 7415 1049; password: 467339). The electronic version of the thesis will be published in Helda: https://helda.helsinki.fi/handle/10138/325857.