644 3 3237 document 644 w4_follow_up_questionnaire_2010.pdf application/pdf 9b0835e45ff42fad4cb9bf7f176cd1611ed7616900fef95e3c315980768dde27 SHA256 537976 2016-01-18 16:53:12 https://datacompass.lshtm.ac.uk/id/eprint/139/10/w4_follow_up_questionnaire_2010.pdf 139 10 10 application/pdf Text en public other_licence

w4_follow_up_questionnaire_2010.pdf

study_instrument indefinite A fourth self-administered postal questionnaire was sent in 2010 and 2011