الوصول الحر: https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-20312Testhttp://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Retrieve&list_uids=17457757&dopt=CitationTest
الوصول الحر: https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-20286Testhttp://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Retrieve&list_uids=17457757&dopt=CitationTest