Table A1.

Brainstorming questionnaire (Delphi process stage 1).

I.  Define a sustainable biosimilar market in Europe from your perspective.
	What does a sustainable biosimilar market look like? Provide up to five key points
II.  What factors contribute to, or create a risk to, biosimilar market sustainability?
	How important are each of these factors in achieving sustainability? Provide up to five key points and indicate how important they are to you (low/moderate/high)
III.  How have biosimilars contributed to the sustainability of health care system(s)?
	Are you aware of any specific, direct benefits from biosimilars entering the market?