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China
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ODORBN
38 个视频
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02:29
1
OpEpi 2_ 0105 ART Ethics, training and logistics
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08:41
2
OpEpi2_0103 Cross-sectional-studies-for-cataract
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03:12
1
OpEpi2_0101 Welcome to the course and session 1_default
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01:07
1
0309 Conclusion and next steps_default
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04:00
1
0308 What is confounding
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06:08
25
What-is-bias
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10:03
25
0305 Other study designs
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24:27
30
0304 Linking research questions and methods
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06:41
35
0303 Cross-sectional studies
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17:20
47
0302 Linking research questions and methods
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06:02
49
0204 The effect of exposure on incidence
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08:42
45
0203 How to calculate incidence
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