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The aim of this experiment is to search for neutrinoless ($0\\nu\\beta\\beta$) decay and investigate two neutrino double beta decay in seven different isotopically enriched samples ($^{100}$Mo, $^{82}$Se, $^{48}$Ca, $^{96}$Zr, $^{116}$Cd, $^{130}$Te and $^{150}$Nd). After analysis of the data corresponding to 3.75 y, no evidence for $0\\nu\\beta\\beta$ decay in the $^{100}$Mo and $^{82}$Se samples was found. The half-life limits at the 90% C.L. are $1.1\\cdot 10^{24}$ y and $3.6\\cdot 10^{23}$ y, respectively. 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