Feldman 2015.

Methods	Identification of subsequent full‐length publications Searched electronic database PubMed to September 2014 Person completing the search not reported Searched by all authors and title Matching criteria not reported
Data	Included 1152 abstracts submitted to the 2005 to 2012 Advancing Transfusion and Cellular Therapies Worldwide and American Society for Apheresis meetings Included all abstracts related to apheresis
Comparisons	Proportion of abstracts published Median time to publication Academic versus non‐academic affiliation Non‐US location of first author versus US location Aphersis type
Outcomes	196 of 1152 abstracts published Proportion of abstracts published by time Median time to publication = 17 months (range = 0 to 108 months) Factors related to proportion of abstracts published included 166/749 abstracts originating from an academic center versus 33/403 abstracts not originating from an academic center published 125/801 abstracts originating in the US versus 74/351 abstracts not originating in the US published
Notes	Hematology ‐ apheresis Funding not reported Data extracted from abstract
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts of a specific topic.
Search for publications?	No	Searched only 1 database.
Follow‐up time?	Yes	All meetings except the 2011 to 2012 meetings had at least 48 months follow‐up.
Matching?	Unclear	Matching criteria not reported.
Adjustment for confounding?	Yes	Examined association of meeting, academic affiliation, US origin and subspecialty with publication using Cox proportional hazard analyses.