1. Department of Chemistry, University of Massachusetts Amherst, 710 N. Pleasant St, Amherst, Massachusetts 01003, USA
2. Molecular and Cellular Biology Graduate Program, University of Massachusetts Amherst, 710 N. Pleasant St, Amherst, Massachusetts 01003, USA
3. MSD Animal Health, Wim de Körverstraat 35, 5831 AN Boxmeer, Netherlands