PRDNCOV1 |
2022 |
In both sample adult and child questionnaires |
PRDNCOV1 |
2021 |
In both sample adult and child questionnaires |
PRDNCOV1 |
2020 |
In both sample adult and child questionnaires |
PRDNCOV1 |
2019 |
In both sample adult and child questionnaires |
PRDNCOV1 |
2018 |
Person (core questionnaire) |
PRDNCOV1 |
2017 |
Person (core questionnaire) |
PRDNCOV1 |
2016 |
Person (core questionnaire) |
PRDNCOV1 |
2015 |
Person (core questionnaire) |
PRDNCOV1 |
2014 |
Person (core questionnaire) |
PRDNCOV1 |
2013 |
Person (core questionnaire) |
PRDNCOV1 |
2012 |
Person (core questionnaire) |
PRDNCOV1 |
2011 |
Person (core questionnaire) |
PRDNCOV1 |
2010 |
Person (core questionnaire) |
PRDNCOV1 |
2009 |
Person (core questionnaire) |
PRDNCOV1 |
2008 |
Person (core questionnaire) |