Text and Data Mining valid from 2019-12-01
Received: 4 March 2019
Accepted: 12 December 2019
First Online: 27 December 2019
: The ioni-APi-TOF instrument has been provided by Ionicon Analytik GmbH for this study. Armin Hansel is co-founder of Ionicon Analytik. The authors declare no potential financial or non-financial conflict of interest.