Table A2.

Key literature identified during brainstorming (Delphi process stage 1).

Topic	Source	References
Savings (implications for health system sustainability)	Systematic literature review/targeted additional search	Vulto A, et al. (2019) [18]
Sustainable competition	Systematic literature review	Mestre-Ferrandiz J, et al. (2016) [16] Dave CV, et al. (2017) [25] Dave CV, et al. (2018) [26]
Access and pricing	Targeted additional search	Moorkens E, et al. (2017) [17] Kawalec P, et al. (2017) [27]
Procurement/purchasing	Review of tender documents (2018)	Vulto A, et al. (2019) [18]
Patient safety/use	Targeted additional search	Tabernero J, et al. (2016) [4] EULAR PARE (2018) [3]