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Telephone cardiopulmonary resuscitation time interval standards. Source: CPR and First Aid Emergency Cardiovascular Care. May 2018 <https://cpr.heart.org/AHAECC/CPRAndECC/ResuscitationScience/TelephoneCPR/RecommendationsPerformanceMeasures/UCM_477526_Telephone- CPR-T-CPR-Program-Recommendations-and-Performance-Measures.jsp>
