A/RES/57/190 9. Calls upon all Member States to take all necessary steps to strengthen international cooperation by means of multilateral, regional and bilateral arrangements for the prevention, detection, investigation, prosecution and punishment of those responsible for acts involving the sale of children, child prostitution, child pornography and child sex tourism, and in this regard calls upon Member States to promote international cooperation and coordination among their authorities, national and international non-governmental organizations and international organizations, as appropriate; 10. Requests States to increase cooperation and concerted action at the national, regional and international levels to prevent and dismantle networks that traffic in children; 11. Stresses the need to combat the existence of a market that encourages such criminal practices against children, including through preventive and enforcement measures that target customers or individuals who sexually exploit or abuse children, and by ensuring public awareness; 12. Calls upon States to enact, enforce, review and revise, as appropriate, laws and to implement policies, programmes and practices to protect children from and to eliminate all forms of sexual exploitation and abuse, including commercial sexual exploitation, taking into account the particular problems posed by the use of the Internet in this regard; 13. Also calls upon States to identify best practices and to take all appropriate national, bilateral and multilateral measures, to allocate resources for the development of long-term policies, programmes and practices, to collect comprehensive and disaggregated gender-specific data and, while reaffirming the right of children, including adolescents, to express themselves freely, to facilitate the participation of child victims of sexual exploitation, taking into account their age and maturity, in the development of strategies to end the sale of children and their organs, sexual exploitation and abuse, including the use of children for pornography, prostitution and acts of paedophilia, and to combat existing markets; 14. Invites all States to take into account, as appropriate, the Yokohama Global Commitment 2001 7 in their efforts towards the prevention and elimination of the commercial sexual exploitation of children; 15. Urges States to afford one another the greatest measure of assistance in connection with investigations or criminal or, where applicable, extradition proceedings brought in respect of the offences set forth in article 3, paragraph 1, of the Optional Protocol to the Convention on the Rights of the Child on the sale of children, child prostitution and child pornography, including assistance in obtaining evidence at their disposal for the proceedings; 16. Calls upon all States to contribute to the elimination of the sale of children, child prostitution and child pornography by adopting a holistic approach, addressing the contributing factors, including underdevelopment, poverty, economic disparity, inequitable socio-economic structures, dysfunctional families, irresponsible adult sexual behaviour, lack of education, urban-rural migration, gender discrimination, harmful traditional practices, armed conflict and trafficking in children; 17. Invites States and relevant United Nations organizations and bodies to allocate appropriate resources for the rehabilitation of child victims of sexual exploitation and abuse and to take all appropriate measures to promote their full recovery and social reintegration; 11