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A pilot study was performed to investigate the possibilities and restrictions of likelihood ratio (LR) investigation using three symptoms. Qualitative vagueness and expectation bias is inherent in our method, but is, in part avoidable. It appears that experienced observers assess common homeopathic symptoms quite similarly. Clinical judgement is an essential part of our work and should be preserved during assessment of LR. The assessment does not influence clinical practice and can be maintained for a long period, provided the appropriate software is used. A limited range of symptoms seems most suitable for LR investigation.
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Rutten et al. (2003) studied this question.
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