“…Layperson CPR training is essential to increase bystander CPR rates and OHCA outcome [20]. Moreover, it is worth remembering that teaching how to act in life-threatening situations, including cardiac arrest resulting from myocardial dysfunction or arrhythmias, is a key element of public safety [21]. Although schools are seen as an ideal environment to involve citizens in BLS training, it is not clear however, which professionals are more suitable for teaching schoolchildren [12,14,22].…”