Designing and Validation of Self-Assessment Tool of Professional Competency and Its Psychometrics in the Administrators of Preschool Educational Centers - Amani, Shahin; Abbasi Dolatabadi, Zahra; Ilaghinezhad Bardsiri, Tayebeh; Nouri, Mahdi; Nasl Saraji, Jebraeil; Poursadeqiyan, Mohsen; Khedri, Behzad; Mohammadzadehaghdam, Abdollah; Zamani, Zahra; Karimzadeh, Mansoureh (Iranian Journal of Public Health, 2022)