Table 2.

Overview of measurements

	Baseline measurements		Intervention period		Post-intervention measurements
	Intervention	Control	Intervention	Control	Intervention	Control
On physician level
Barrier questionnaire					x	x
Process evaluation			x	x	x
Resource use					x	x
On patient level (through retrospective chart review)
Primary and secondary outcomes, complications and adverse events	x	x	x		x	x
Patient characteristics	x	x	x		x	x
Techniques during surgical procedure	x	x	x		x	x
Postoperative care	x	x	x		x	x