Here you will find a full list of countries involved in IPEN Adult studies and IPEN Adolescent Studies.
AustraliaBelgiumBrazilColombiaCzech RepublicDenmarkHong KongMexicoNew ZealandSpainUnited StatesUnited Kingdom
AustraliaBangladeshBelgiumBrazilCzech RepublicDenmarkHong Kong IndiaIsraelMalaysiaNew ZealandNigeriaPortugalSpainUnited States
