1. Department of Chemistry; Queen's University; Chernoff Hall 90 Bader Lane Kingston Ontario K7L 3N6 Canada
2. Department of Pharmaceutical Biology and Biotechnology; Institute of Pharmaceutical Sciences; Albert-Ludwigs-Universität Freiburg; Stefan-Meier-Strasse 19 79104 Freiburg Germany
3. Michael G. DeGroote Institute for Infectious Disease Research; McMaster University; 1200 Main Street West Hamilton Ontario L8N 3Z5 Canada
4. Trace Element Speciation Laboratory; Department of Chemistry; University of Aberdeen; Aberdeen AB24 3UE UK