How many different affiliations do the authors of 'ECG Information System based on AHA/ACC/HRS electrocardiography diagnostic statement list' have?
Count the different affiliations of the authors of 'ECG Information System based on AHA/ACC/HRS electrocardiography diagnostic statement list'.
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { <https://dblp.org/rec/conf/bmei/DingZZLD11> <https://dblp.org/rdf/schema#authoredBy> ?x . ?x <https://dblp.org/rdf/schema#primaryAffiliation> ?answer }
<https://dblp.org/rec/conf/bmei/DingZZLD11>