Hong Kong Headache Index SurveyBack
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 Appendix2 : frequency for sample of respondents with worsening headache and the overall sample (Chinese pdf only) Appendix3 : cross tabulation results (Chinese pdf only) | 
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 Appendix2 : frequency for sample of respondents with worsening headache and the overall sample (Chinese pdf only) Appendix3 : cross tabulation results (Chinese pdf only) | 



