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This paper reports on a questionnaire survey of 16 national libraries designed to clarify how national libraries attempt to justify their web archiving activities. Results indicate they envisage that a) the benefits brought about by their initiatives are greater than the overall costs, b) the costs imposed on libraries are greater than the costs imposed on stakeholders, and c) all of them are making efforts to respond to legal risks in various ways (e.g. legislation, contracting and opt-out policies) although there are trade-off relations in terms of costs for negotiation, scope of access and size and scope of the web archive. The paper discusses whether a basic logic for justification of their web archiving is valid from the perspective of balancing cost-benefit. Further, it highlights the potential, underlying premises of the logic that motivates the intervention of national libraries as public sector organizations. (Contains 3 tables and 2 figures.)

Aims To report a systematic review of the psychometric properties of self-report instruments to identify the symptoms of anxiety in pregnancy to help clinicians and researchers select the most suitable instrument. Background Excessive anxiety in pregnancy is associated with adverse birth outcomes, developmental and behavioural problems in infants and postnatal depression. Despite recommendations for routine psychological assessment in pregnancy, the optimal methods to identify anxiety in pregnancy have not been confirmed. Design Psychometric systematic review. Data sources A systematic literature search of the multiple databases (1990-September 2014). Review methods Identification of self-report instruments to measure anxiety in pregnancy using COSMIN guidelines to assess studies reporting a psychometric evaluation of validity and reliability. Results Thirty-two studies were included. Studies took place in the UK, Australia, Belgium, Canada, Germany, Italy, Scandinavia, Spain and the Netherlands. Seventeen different instruments were identified. Measures of validity were reported in 19 papers and reliability in 16. The overall quality of the papers was rated as fair to excellent using the COSMIN checklist. Only one paper scored excellent in more than one category. Conclusion Many instruments have been adapted for use in different populations to those for which they were designed. The State Trait Anxiety Inventory, Edinburgh Postnatal Depression Scale and the Hospital Anxiety and Depression Scale have been tested more frequently than other instruments, yet require further assessment to confirm their value for use in pregnancy. [ABSTRACT FROM AUTHOR]