Ali, Sulafa Handheld echocardiography for screening and control of rheumatic heart disease study in Gezira state, Sudan: a double approach model. [electronic resource] - Cardiovascular diagnosis and therapy Aug 2018 - 500-507 p. digital Publication Type: Journal Article ISSN: 2223-3652 Standard No.: 10.21037/cdt.2018.07.04 doi