eTable 2. Interview partners by federal state.

	Federal state
	BW	FB	B	BR	HB	HH	HE	MV	N	NW	RP	S	FS	SA	SH	T	Total
Chief executive officers	1	–	10	2	2	2	1	1	3	3	1	–	3	1	1	–	31
Doctors	2	4	3	1	4	6	–	1	4	1	–	–	–	1	5	–	32
Total	3	4	13	3	6	8	1	2	7	4	1	–	3	2	6	–	63

BW Baden-Württemberg; FB Bavaria; B Berlin; BR Brandenburg; HE Hesse; MV Mecklenburg-West Pomerania; HB Bremen; HH Hamburg; N Lower Saxony; NW North Rhine-Westphalia; RP Rhineland-Palatinate; S Saarland; FS Saxony; SA Saxony-Anhalt; SH Schleswig-Holstein; T Thuringia