1. Laboratory for Synchrotron Radiation and Femtochemistry, Photon Science Division, Paul Scherrer Institut, 5232 Villigen, Switzerland
2. Laboratory for Advanced Photonics, Photon Science Division, Paul Scherrer Institut, 5232 Villigen, Switzerland
3. Laboratory of Biomolecular Research, Biology and Chemistry Division, Paul Scherrer Institut, 5232 Villigen, Switzerland