Two types of costs will be considered: 1) direct costs of the intervention (e.g training costs, space or rent costs, costs to develop the code of conduct) and 2) direct costs due to health system disruption (e.g. health care services foregone or postponed, material etc.), cost incurred by the HCWs as a consequence of violent episodes including direct medical costs (e.g. hospital stay cost, consultation costs, laboratory costs), non-medical costs (e.g. transportation, meals etc.), and indirect costs (e.g. absenteeism, presenteeism).