Objective(s): To survey of the gap between perceptions and expectations of patients from quality service of treatment center. Methods: This study is descriptive-analytical that is cross-sectioned of goal oriented with 200 patients (at least with 3 days admission in the hospital of Zahedan) that was studied with parasoraman & et al questionnaire in 2 stages. before care and after care.... https://www.ceomelinh.com/product-category/shopwill/