A/HRC/19/64 c. longitudinal large-scale research on the root causes of violence and the interdependence of its various forms; d. development of a harmonised methodology with a common set of indicators, allowing for the identification of groups of children vulnerable to violence; e. ongoing research into the precise nature of risks to children via the Internet, and how these risks shift over time and are mitigated by interventions; f. research into protective factors, notably children‘s resilience mechanisms; g. surveys on adult and child perpetrators of violence to develop criteria and parameters for their assessment and treatment; h. research into what works to protect children from violence and to evaluate existing responses, including methodologies for the evaluation and assessment of violence prevention services and programmes and the development of quality criteria; i. surveys to quantify the social costs of violence against children. Statistical monitoring a. regular statistical monitoring, on the basis of established methodology, of violence against children at national, regional and local levels in all settings. The data should be broken down by gender, age, form of violence, urban or rural household, families‘ characteristics, level of education and national, social and ethnic origin; b. collection of quantitative and qualitative data on the length and outcomes of judicial proceedings involving children, including protective measures provided for child victims of violence. Establishment of national databasesddd a. on children‘s births and deaths, including the establishment of a child death (and serious injury) review mechanism; b. on children entering, leaving, or changing institutions, and all forms of alternative care and detention facilities, including the recording of all cases of violence against children in such institutions; c. on persons convicted of violent offences against children, including their genetic profile (DNA).eee Co-ordination a. the designation (where possible and in conformity with national circumstances) of a single authority, preferably an observatory on the rights of the child, a national statistical office or a research institute, to coordinate and disseminate childrenrelated data nationwide and exchange information internationally; b. collection. active contribution by all agencies with a child protection role to data 2. All institutions, services and facilities recruiting personnel to work for and with children should be afforded easy but appropriately controlled access to data on persons convicted of violent offences against children. ddd eee 90 In accordance with data protection rules. Refer to Article 37, the Council of Europe Convention on the Protection of Children against Sexual Exploitation and Sexual Abuse.