“…The studies were conducted from a North American or European economic perspective: 18 of the studies were conducted in the United States [26,29,31-41,45,48,51-53,55], six in the United Kingdom [21,23,25,46,57,58], four in Canada [23,28,34,51], and three in Italy [27,30,44], two in Sweden [42,47], and one each in Spain [43], Belgium [49], France [20], Norway [54], Switzerland [56], and Germany [24]. Seven studies were conducted from the perspective of the hospital [24,41,42,44,45,49,53], four from a societal perspective [20,28,30,32], nine from the perspective of another specific payer [23,31,33,40,54-58], and the remaining 19 studies did not clearly specify which perspective was used.…”