The traditional hierarchy proof in clinical epidemiology description of cases and transversal research
Solid epidemiological research as the research conducted in the range of general totality, which in epidemiology is named as the term of population. Familiarity with the terminology of epidemiological studies. Analysis of the principle of randomization.
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Discussion the results of clinical two-year dental research. Comparison of postoperative sensitivity of abutment teeth restored with full coverage restorations retained with either conventional glass-ionomer cement or a new adhesive resin cement.
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