“… 13 , 14 , 20 , 23 Characteristics of the included studies are provided in Table 1 . Studies used data from around the world: South Korea ( n = 3), 13 , 14 , 23 China ( n = 2), 17 , 18 the Middle East ( n = 2), 15 , 16 Italy ( n = 1), 19 Europe ( n = 1), 20 the USA and Canada ( n = 2), 21 , 22 and the Balkans ( n = 1). 12 …”