nasim hafezi department of immunology, school of medicine abolghasem ajami department of immunology, school of medicine touraj farazmandfar school of advanced medical science technologies, golestan university of medical sciences, gorgan vahid hosseini inflammatory diseases of upper gi tract research center, imam hospital, mazandaran university of medical sciences, sari, iran reza alizadeh-navaei molecular and cell biology research center, mazandaran university of medical sciences, sari mohsen tehrani department of immunology, school of medicine