Text and Data Mining valid from 2019-02-21
Received: 8 November 2018
Accepted: 5 February 2019
First Online: 21 February 2019
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: The authors have no competing interests although both engaged in consulting activities but none of these have a conflict of interest with the current subject. Both has published several original papers and reviews on PSLT in previous academic (PB) and corporate (KD) settings.
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