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090717s1997 dk ||||| eng |
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|a 9234081
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|a Sistema de Bibliotecas de la Universidad de Costa Rica
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|a eng
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|a 570.151.95
|b A441c
|2 22
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|a Altman, Douglas G.
|e Autor/a
|4 aut
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|a Calculating the number needed to treat for trials where the outcome is time to an event /
|c Douglas G. Altman, Per Kragh Andersen
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|a Denmark :
|b Universidad of Copenhagen. Departamento of Biostatistics.,
|c [1998?].
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| 300 |
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|a 15 páginas :
|b ilustraciones
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0 |
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|a Research report
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|a ESTADISTICA VITAL
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| 650 |
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|a BIOMETRIA
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|a Andersen, Per Kragh
|e Autor/a
|4 aut
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| 900 |
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|a 2010 feb
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|a 25-JAN-2010 - SALAZAR ALVAREZ, CLAUDIO
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|a 17-JUL-2009 - BUSTAMANTE MORA, CYNTHIA
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| 949 |
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|a CSA -KA
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| 916 |
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|a Centro Catalográfico
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