1. Animal Production Team, Biotechnology and Agriculture Division; Biotechnology Research Center; Ali Mendjli, Constantine, Algeria
2. Private Avian Disease Clinic, Blida, Algeria
3. Bio-informatics and Bio-statistics Unit (BIBS-U); Biotechnology Research Center; Ali Mendjli, Constantine, Algeria
4. Environment Biotechnology Division; Biotechnology Research Center; Ali Mendjli, Constantine, Algeria
5. National Veterinary School, Oued Smar, Algiers, Algeria
6. Royal Veterinary College, Hertfordshire, UK