Table 2.

Scope (components and main targeted determinants) and sequence of the intervention.

Menua	Componentb: main targeted determinants
Information about the HPV-vaccination	General information: knowledge
	Facts and stories: beliefs, positive and negative outcome expectancies
	From HPV to cervical cancer: knowledge
	Ways to protect against cervical cancer: relative effectiveness
	Side effects of the HPV-vaccination: negative outcome expectancies
	Importance vaccinating at young age: positive outcome expectancies
	Other mothers: descriptive norm
	Working mechanisms vaccination: knowledge
	Chance of getting HPV/cervical cancer: risk perception having received (no) HPV-vaccination
	Effectiveness and safety of the HPV-vaccination: beliefs, positive outcome expectancies
Weighing up the pros and cons	Decisional Balance: attitude, ambivalence
	Values clarification: attitude, ambivalence
Practical information	Talking about the HPV-vaccination: attitude, self-efficacy, subjective norms
	Where do I get the HPV-vaccination: knowledge, planning, self-efficacy
	2 instead of 3 HPV-injections: knowledge
Frequently asked questions	Frequently asked questions about the HPV-vaccination: n/a
	Frequently asked questions about getting the HPV-vaccination: n/a
	Problems with the website: n/a

n/a, not applicable.

^aWithin and across the different menus, a freedom of choice design was used.

^bWithin the various components, a tunnel design was used.