“…In almost all indoor radon surveys, the great majority of measurement locations were dwellings. However, other measurement locations were also selected in some surveys: schools and kindergartens (Iceland (Jónsson et al, 2015), Luxembourg (Kies et al, 1997), Russia (Zhukovsky et al, 2012), Slovakia (Vicanova et al, 1998; Vladár et al, 1996), Slovenia (Humar et al, 1995; Vaupotic et al, 1992), Ukraine (Pavlenko et al, 2014)), industrial buildings and workplaces (Azerbaijan (Hoffmann et al, 2017), Moldova (Ursulean et al, 2013), Luxembourg (Kies et al, 1997), Italy (Carelli et al, 2009)), swimming pools (Iceland (Jónsson et al, 2015)), spa buildings and caves (Slovakia (Vicanova et al, 1998)) and underground Telecom inspection rooms (Italy (Carelli et al, 2009)).…”