 In 2006, a refined estimate by the same authors stated the half-life was 2.3 years.This half-life has been excluded at high confidence by other experiments, including in 76Ge by GERDA.As of 2017, the strongest limits on neutrinoless double beta decay have come from GERDA in 76Ge, CUORE in 130Te, and EXO-200 and KamLAND-Zen in 136Xe.