“…Out of 2089 articles selected from the electronic databases, 18 studies were eligible for a qualitative and quantitative analysis (figure 1). The pooled sample size included 1687 patients enrolled from 10 countries (USA [7-9, 17, 18], Japan [14,19,20], Italy [4,5], Spain [6,10], Poland [21], Greece [11], Turkey [22], India [12], Norway [23], and Switzerland [13]). Mean±SD age of the population target was 60.4±5.8 years, although data were reported only in eight studies [5-7, 11-14, 22].…”