1. Magnetic Resonance Center (CERM), University of Florence, and Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine (CIRMMP), Via L. Sacconi 6, Sesto Fiorentino 50019, Italy
2. Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia 3, Sesto Fiorentino 50019, Italy
3. Giotto Biotech, S.R.L, Via Madonna del piano 6, Sesto Fiorentino, Florence 50019, Italy
4. Analytical Development Biotech Department, Merck Serono S.p.a, Merck KGaA, Guidonia, Rome 00012, Italy