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Compared with other major disease groups, skin conditions are the most frequent reason for consultation in general practice. This result emphasizes the need for appropriate education and training for all medical students and particularly for continuing education in dermatology for all primary health care professionals.

An area of plant science that is still uncertain is precisely what determines plants' demand for nitrogen (N), that is the amount of N they need to take up from the soil to meet their requirements for potential growth and synthesis of new tissue. A robust and unequivocal physiological basis from which to determine N demand is lacking. Yet N dominates plant nutrition. No nutrient is needed in larger quantities and, in most environments, no nutrient is in such limiting supply. Knowledge of the factors governing N demand is essential to predict the needs of crops under a wide range of field situations, so that growers can be given more reliable fertilizer recommendations (Greenwood 1982; van Keulen et al. 1989). This is important, not just for economic reasons, but because of the risks to the environment that can arise from the over-application of N fertilizers, in particular the problem of nitrate leaching (Addiscott et al. 1991).

REVISED VERSION FEBRUARY 2012 2 Grindlay et al. A comparison of the coverage of veterinary journals by nine bibliographic databases.ABSTRACT A thorough search of the literature to find the best evidence is central to the practice of evidence-based veterinary medicine. This requires knowledge of which databases to search to maximise journal coverage. The aim of this study was to compare the coverage of active veterinary journals by nine bibliographic databases to inform future systematic reviews and other evidence-based searches. Coverage was assessed using lists of included journals produced by the database providers. For 121 active veterinary journals in the "Basic list of veterinary medical serials, third edition", the percentage coverage was highest for Scopus (98.3%) and CAB Abstracts (97.5%). For an extensive list of 1139 journals with significant veterinary content compiled from a variety of sources, coverage was much greater in CAB Abstracts (90.2%) than in any of the other databases, the next highest coverage being in Scopus (58.3%). The maximum coverage of the extensive journal list that could be obtained in a search without including CAB Abstracts was 69.8%. It was concluded that to maximise journal coverage and avoid missing potentially relevant evidence, CAB Abstracts should be included in any search of the veterinary literature.

A significant proportion, particularly of B2 fractures, were treated without revision of the stem. These were associated with a higher rate of re-operation. The treatment of B3 fractures without revision of the stem resulted in a high rate of re-operation. This demonstrates the importance of careful evaluation and accurate characterisation of the fracture at the time of presentation to ensure the correct management. There is a need for improvement in the reporting of data in case series recording the outcome of the surgical treatment of periprosthetic fractures. We have suggested a minimum dataset to improve the quality of data in studies dealing with these fractures. Cite this article: 2017;99-B(4 Supple B):17-25.