1. Department of Hepatitis and AIDS, Pasteur Institute of Iran, Tehran, Iran.
2. Department of Virology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
3. Dipartimento di Medicina Interna e Specialità Mediche, Sapienza Università di Roma, Rome, Italy.
4. Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.