bibliographic resource 174196 [br/174196]
https://w3id.org/oc/corpus/br/174196

is a

• document
• article

title

• Why we need observational studies to evaluate the effectiveness of health care

publication date

• 1996-01-01

contributor

• https://w3id.org/oc/corpus/ar/474068
• https://w3id.org/oc/corpus/ar/474069

format

• https://w3id.org/oc/corpus/re/61333

identifier

• https://w3id.org/oc/corpus/id/245586
• https://w3id.org/oc/corpus/id/245587
• https://w3id.org/oc/corpus/id/245588
• https://w3id.org/oc/corpus/id/245589

part of

• https://w3id.org/oc/corpus/br/174197