Retinopathy of prematurity: applicability of international and national screening guidelines in the north of Iran - Yousef Alizadeh; Hassan Behboudi; Maryam Dourandeesh; Reza Soltani-Moghadam; Mitra Akbari; Abdolreza Medghalchi; Ebrahim Azaripour; Zahra Moravvej (The Turkish Journal of Pediatrics)