PMC:2675008 / 282-321
Annnotations
{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/2675008","sourcedb":"PMC","sourceid":"2675008","source_url":"https://www.ncbi.nlm.nih.gov/pmc/2675008","text":"Design\nProspective observational study.","divisions":[{"label":"title","span":{"begin":0,"end":6}}],"tracks":[]}