seyed shahin soltani faculty of traditional medicine, shahid beheshti university of medical sciences, tehran, ir iran; traditional medicine and material medical research center, shahid beheshti university of medical sciences, tehran, ir iran; faculty of traditional medicine, shahid beheshti university of medical sciences, tehran, ir iran. tel: +98-2188773521, fax: +98-2188795008 bagher minaii faculty of medicine, tehran university of medical sciences, tehran, ir iran; traditional medicine department, faculty of traditional medicine of tehran university of medical sciences, tehran, ir iran mehdi besharat loqman-e-hakim hospital, department of infectious diseases, shahid beheshti university of medical sciences, tehran, ir iran