Table 2.

Interview informants and roles per case study^a

	Left ventricular assist deviceb	Fenestrated endovascular aneurysm repairb	Expensive cancer drugs	Eylea and Lucentis	Population screening for colon cancer	Robotic surgery
Medical doctors	5	8	12	8	8	6
Managers/directors	2	3	1	1	2	2
Professional scientific associations			1	1	1	1
Patient associations			1	1	1	1
Manager sales	1	3	1			1
Board of directors	1	1	5	4	4	2
Insurer		1	1	1	1	2
Hospital pharmacists			3
Other			1		1
Hospital respondents recruited from:	Recruited from three university medical centres	Recruited from two general hospitals, four university medical centres	Recruited from four general hospitals, five university medical centers	Recruited from two general hospitals, two specialized clinics, four university medical centers	Recruited from six general hospitals, four university medical centers	Recruited from six general hospitals, three university medical centers

^a Informants may be listed on several roles or columns. For example, a medical doctor may be a part-time member of the sales team of the hospital, or a member of the board of directors may have spoken about two or more case studies

^b We interviewed active members of the professional scientific associations (f.e. members of guideline committees), but not formally as representatives of the professional scientific association