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Objectives/Hypothesis
To 1) examine the characteristics of patients who develop second primary malignancies (SPMs) from an index human papillomavirus (HPV)‐related head and neck squamous cell carcinoma (HNSCC) and HPV‐unrelated HNSCC and to 2) compare overall survival between those with HPV‐related and HPV‐unrelated index HNSCC among patients who develop SPM.
Study Design
Retrospective cohort analysis...
At the end of 1998, universal hepatitis A+B vaccination of 12 year olds was introduced in Catalonia. The aim was to examine trends in hepatitis A during 2005‐2015 and assess risk factors by age group. We carried out an observational epidemiological study of the incidence and risk factors of hepatitis A reported to the surveillance system. Information on exposure was recorded for each case for the...
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