Table 1.

An overview of the criteria for participation in Studies 1–3.

	Selection of participants	Study 1	Study 2	Study 3
Scientific experience and expertise	In vitro models	x		x
	In vitro models AND chemical risk assessment	x		x
	In vitro models AND systematic review methods	x	x	x
	In vitro models AND experienced with the development of relevant guidance documents for chemical risk assessors	x		x
Balancing factors	Academia	x	x	x
	Governmental institutions (including risk assessment institutions and research institutes)	x	x	x
	Private sector research institutions	x	x	x
	Gender distribution	x	x	x
	Demographic distribution	x	x	x
	Regional distribution	x	x	x
Academic level	Post-doctoral level or higher	x	x	x
Language	English, level B1 or higher	x	x	x