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azzam_mokhtar@y azzam_mokhtar@y
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6 years ago
__________ mortality is a problem for a specific form of longitudinal study, in which the participants drop out of the project or disappear completely.
 
  a. cohort.
  b. panel.
  c. trend.
  d. longitudinal.
  e. cross-sectional.
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vercula 5.vercula 5.
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6 years ago
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