The prevalence of attention deficit hyperactivity disorder (ADHD) among school children of Nishaboor – Iran during 2006 oleh Ali Moradi (MSc), Mehdi Khabazkhoob (MSc), Tahmineh Agah (BSc), Ali Javaherforoushzadeh (MD), Bijan Rezvan (MD), Zahra Haeri Kermani (MD), Somayeh Palahang (BSc)