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Headache semiology of uncomplicated ICVAD is mostly homogenous in the present study. These characteristics may be helpful in the diagnosis of uncomplicated ICVAD.

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Objective: This study aims to examine trends in studies of teens' health information behaviour. Methods: Eighty-two articles published between 2000 and 2012 were selected and analysed in various aspects: health topics by year, information sources, data collection methods, use of theories and models, collaborative and interdisciplinary efforts and published journals. Results: Fifty-seven per cent of the studies focused on specific health topics, such as sexual health, while the rest covered general health topics. Almost half of the studies examined how teens search for and use health information on the Internet. Surveys were the most popular data collection technique. Only 12.2% were based on a theory or model. About 42% were conducted collaboratively by authors from multiple disciplines. Discussion and Conclusions: With the increasing attention to specific health topics and online resources, the health information behaviour of teens has been examined more frequently since the mid-2000s. Its interdisciplinary nature was evidently shown from various disciplines that the authors were affiliated with and the journals of the published studies represented. This study suggests that there should be efforts to reflect new technology tools, apply mixed methods and increase the engagement level of collaboration to evolve this research domain.Keywords: information literacy; research capacity; review, literature Key Messages• Health librarians should recognise their clients' challenges in grasping the trends of teens' health information behaviour studies because of their interdisciplinary and quickly evolving nature.• Health librarians should provide research support and information literacy programmes that reflect the various involved disciplines and their research trends in teens' health information behaviour.• Future studies should devote effort to including new technology tools, applying mixed methods and increasing the engagement level of collaboration to evolve this research domain.