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Danforth's short tail (Sd) is a semidominant mutation in mouse affecting the axial skeleton and urogenital system. The notochord is the first visibly abnormal structure in mutant embryos, and disintegrates beginning around embryonic day 9.5 along its entire length, suggesting an essential role for Sd in notochord development and maintenance. Here, we report(More)
BACKGROUND Despite the rapid transition into routine clinical practice of molecular techniques based on PCR, external quality assessment (EQA) is still not widely available. The European Union and European Communities Confederation of Clinical Chemistry have supported the EQUAL project as a series of 3 different EQA programs for the assessment of molecular(More)
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