Funding
The study was funded by the following foundations: Mahle Stiftung, Stuttgart, Germany, Christophorus Stiftung, Stuttgart, Germany, Dr. Hauschka Stiftung, Bad Boll/Eckwälden, Germany, Stiftung Helixor, Rosenfeld, Germany, Gyllenberg Foundation, Helsinki, Finland. The foundations were not involved in the study design, the collection, analysis or interpretation of the data. MK, DP and RZ received financial support by Humanus Institute, Berlin, Germany and Software AG Stiftung, Darmstadt, Germany. AB received financial support by Software AG Stiftung, Darmstadt, Germany.