DOI:
10.1055/s-00034612
Yearbook of Medical Informatics
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References
Califf RM, Zarin DA, Kramer JM, Sherman RE, Aberle LH, Tasneem A.
Characteristics of clinical trials registered in ClinicalTrials.gov, 2007-2010.
JAMA 2012 May 2
307 (Suppl. 17) 1838-47.
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