1. Département
de Chimie Physique, Université de Genève, 30, quai
Ernest-Ansermet, 1211 Genève 4, Switzerland
2. Institute
of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt
9/163/MC, 1060 Vienna, Austria
3. Christian Doppler Laboratory for Photopolymers in Digital and Restorative Dentistry, Getreidemarkt 9, 1060 Vienna, Austria
4. Ivoclar
Vivadent AG, Bendererstrasse
2, 9494 Schaan, Liechtenstein