Source:http://linkedlifedata.com/resource/pubmed/meshheading/6863069-Retrospective+Studies
| Subject | Predicate | Object | Context |
|---|---|---|---|
| pubmed-meshheading:6863069-... | rdf:type | pubmed:MeshHeading | lld:pubmed |
| pubmed-meshheading:6863069-... | pubmed:mesh | pubmed-mesh:Retrospective... | lld:pubmed |
| pubmed-article:6863069 | pubmed:meshHeading | pubmed-meshheading:6863069-... | lld:pubmed |