This research has been funded by a coffee retail company, which by no surprise shows positive benefits of drinking coffee. To credit it says so on the springer

This research has been funded by a coffee retail company, which by no surprise shows positive benefits of drinking coffee. To credit it says so on the springer verlag page. "Funding This study has been supported by Tchibo GmbH, Hamburg, Germany." Tchibo GmbH "Tchibo is a German chain of coffee retailers and cafés known for its range of non-coffee products that change weekly."