Allenspach, Martina
Valder, Claudia
Flamm, Daniela
Steuer, Christian
Article History
Received: 31 March 2021
Accepted: 30 July 2021
First Online: 19 August 2021
Competing interests
: Systema Natura confirms in the name of all authors (C.V., D.F.) employed at Systema Natura GmbH, that this research may lead to the development of products in which Systema Natura has a business interest. This is in accordance with the policies of the company as well as in the interest of the individuals and their ethical obligation as a researcher. Accordingly, C.V. and D.F. have disclosed those interests fully to ETH Zürich. Systema Natura has established an approved plan for managing any potential conflicts arising from this arrangement. M.A. and C.S declare that there is no conflict of interests.