1. Department of Chemistry, University of Toronto Scarborough, Toronto, M1C 1A4 Ontario, Canada
2. Bruker BioSpin AG, Industriestrasse 26, Fällanden 8117, Switzerland
3. Bruker BioSpin GmbH, Rudolf-Plank-Str. 23, Ettlingen 76275, Germany
4. Department of Chemistry, Clemson University, Clemson, 29634 South Carolina, United States