[Systematic reviews and meta-analyses: how should they be performed, evaluated and used?].
Servicio de Aparato Digestivo, Hospital Universitario de La Princesa, Universidad Autónoma de Madrid, Spain. gisbert@meditex.es
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D015982:Bias; D002986:Clinical Trials as Topic; D003627:Data Interpretation, Statistical; D016206:Databases, Bibliographic; D005069:Evaluation Studies as Topic; D019317:Evidence-Based Medicine; D020407:Internet; D015201:Meta-Analysis as Topic; D012196:Review Literature as Topic