1. The Pirbright Institute, Ash Road, Pirbright, Woking, Surrey GU24 0NF, UK.
2. ReiThera Srl, Rome 00144, Italy.
3. Istituto Superiore di Sanità, Rome 00161, Italy.
4. Keires AG, Basel CH-4051, Switzerland.
5. CEINGE, Naples 80131, Italy.
6. Department of Molecular Medicine and Medical Biotechnology, University Federico II, Naples 80138, Italy.