Alagiyawanna, A. Veerasingam, Esther Townsend, Nick Additional file 1: of Prevalence and correlates of exposure to second hand smoke (SHS) among 14 to 15 year old schoolchildren in a medical officer of health area in Sri Lanka Questionnaire. (DOC 49 kb) Second hand smoking;Passive smoking;Southeast Asia;Sri Lanka;Non-communicable disease;Adolescents;Schoolchildren 2018-11-07
    https://springernature.figshare.com/articles/journal_contribution/Additional_file_1_of_Prevalence_and_correlates_of_exposure_to_second_hand_smoke_SHS_among_14_to_15_year_old_schoolchildren_in_a_medical_officer_of_health_area_in_Sri_Lanka/7313756
10.6084/m9.figshare.7313756.v1