Table 1.

Study period with randomisation steps

Centres	Historical control-periods				Periods of core-study
	(4 × 6 months)				Jan-Jun	Jul-Dec	Jan-Jun	Jul-Dec	Jan-Jun	Jul-Dec
	Jan-2013 - Dec 2014				2015	2015	2016	2016	2017	2017
A – D	0	0	0	0	0	1	1	1	1	1
E – I	0	0	0	0	0	0	1	1	1	1
J – N	0	0	0	0	0	0	0	1	1	1
O – R	0	0	0	0	0	0	0	0	1	1

0=’control’; 1=’intervention’ - eGFR graph surveilence