Visitors   Views   Downloads

Time arrow in published clinical studies/trials indexed in MEDLINE: a systematic analysis of Retrospective vs Prospective study design, from 1960 to 2017.

View preprint
56 days ago
Time arrow in published clinical studies/trials indexed in MEDLINE: a systematic analysis of Retrospective vs Prospective study design, from 1960 to 2017. https://t.co/nJhqeMcCU0
NOT PEER-REVIEWED
"PeerJ Preprints" is a venue for early communication or feedback before peer review. Data may be preliminary.

Supplemental Information

Search Strategy and Contribution

Revised search strategy and contribution.

DOI: 10.7287/peerj.preprints.27385v1/supp-1

Raw data

Partial data collection

DOI: 10.7287/peerj.preprints.27385v1/supp-2

Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Michele M Ciulla conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, prepared figures and/or tables, authored or reviewed drafts of the paper, approved the final draft.

Patrizia Vivona performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, authored or reviewed drafts of the paper, approved the final draft.

Data Deposition

The following information was supplied regarding data availability:

Database

The raw data are provided in the Supplemental File.

Funding

The authors received no funding for this work.


Add your feedback

Before adding feedback, consider if it can be asked as a question instead, and if so then use the Question tab. Pointing out typos is fine, but authors are encouraged to accept only substantially helpful feedback.

Some Markdown syntax is allowed: _italic_ **bold** ^superscript^ ~subscript~ %%blockquote%% [link text](link URL)
 
By posting this you agree to PeerJ's commenting policies