Results 261 to 261 of about 1,193,547 (261)
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Science
, 1993
L L, Cavalli-Sforza
, P, Menozzi, A, Piazza
+2 more
openaire
pubmed.ncbi.nlm.nih.gov
copy doi
(10.1126/science.261.5128.1508)
openaccessbutton.org (pdf)
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reliability
validity
service quality
covid-19
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