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subscription/membership/fee required Atypon https:///www.science.org/doi/10.1126/science.1256780?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25504732/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/25504732
free resource scite Smart Citations https://scite.ai/reports/25504732