PERC Authorship Guidelines for Publications

It is expected that all PERC approved studies must include the PERC logo on presentation slides and posters as well as including PERC in the main list of authors and methods section of all manuscripts.

Special Considerations: RCTs

All PIs of PERC-Endorsed RCTs must register their trial prior to enrolling patients; publish the study protocol either in a peer-review journal or on a publically available, maintained website (e.g. Research Institute website) and must explicitly name PERC in the main author line and in the methods. These requirements will be detailed in the PERC-Endorsement letter. All PERC approved studies must provide the trial registry number to PERC executive. All RCTs must also provide the PERC executive with a list of DSMB members and their affiliations and a copy of the DSMB charter prior to commencing patient recruitment. Resources and examples provided on the PERC website.

Special Considerations: Cohort Studies

All PIs of large prospective cohort studies must publish the study protocol either in a peer-reviewed journal or on a publically available and maintained website. This requirement will be detailed in the PERC-Endorsement letter. The study protocol must explicitly name PERC in the main author line and in the methods.


  1. Prior to the start of any PERC study the principal and site investigators should agree upon the contribution of each member to the study and the implications this has on authorship.
  2. Participation in PERC studies does not guarantee authorship. PERC principal investigators should generally adhere to the Uniform Requirements for Manuscripts Submitted to Biomedical Journals, issued by the International Committee for Medical Journal Editors which is quoted below:

All persons designated as authors should qualify for authorship, and all those who qualify should be listed. Each author should have participated sufficiently in the work to take public responsibility for appropriate portions of the content. One or more authors should take responsibility for the integrity of the work as a whole, from inception to published article.”

“Authorship credit should be based only on 1) substantial contributions to conception and design, or acquisition of data, or analysis and interpretation of data; 2) drafting the article or revising it critically for important intellectual content; and 3) final approval of the version to be published. Conditions 1, 2, and 3 must all be met. Acquisition of funding, the collection of data, or general supervision of the research group, by themselves, do not justify authorship.”

Other Publications

November 2018

Congratulations to the current PERC Chair, Dr. Stephen Freedman, et al. who have had their study “Multicenter Trial of a Combination Probiotic for Children with Gastroenteritis” published in the prestigious New England Journal of Medicine today. Citation and link to the journal article below:

Stephen B Freedman MDCM, Sarah Williamson-Urquhart B.Sc.Kin, Ken J Farion MD, Serge Gouin MDCM, Andrew R Willan Ph.D, Naveen Poonai MD, Katrina Hurley MD, Philip M Sherman MD, Yaron Finkelstein MD, Bonita E Lee MD, Xiao-Li Pang Ph.d, Linda Chui Ph.d, David Schnadower MD MPH, Jianling Xie MD MPH, Mark Gorelick MD and Suzanne Schuh MD for the PERC PROGUT Trial Group.

The six PERC sites that were involved in the study were Alberta Children’s Hospital, Sick Kids, London, IWK, CHEO and Ste. Justine.

See below for the media coverage links.

Canadian Media Coverage:

International Media Coverage:




 United Kingdom:

PERC Site Coverage

Calgary – 

Toronto –

Great work everyone on this ground breaking study on probiotics for children with gastroenteritis!

Be sure to follow the PERC network here on Twitter for the latest updates and further knowledge translation on PERC studies – twitter handle: @PERC_Network. If you have any successes, relevant information or other PERC publications you would like shared on social media, feel free to send them to the PERC Coordinator, Becky Emerton (, we would be happy to tweet about them with our ever-growing following.


Congratulations to Roger Zemek and team for their publication on the derivation and validation of a clinical risk score for persistent postconcussion symptoms. This important study received the attention of the Federal Health Minister (Jane Philpott), and we are told that ‘PERC’ was mentioned as a main contributor to the study’s success!

Great work everyone on this ground breaking study on concussion. Citation and media links below.

Zemek R, Barrowman N, Freedman SB, Gravel J, Gagnon I, McGahern C, Aglipay M, Sangha G, Boutis K, Beer D, Craig W, Burns E, Farion K, Mikrogianakis A, Barlow K, Dubrovsky AS, Meeuwisse W, Gioia G, Meehan WP, Beauchamp M, Kamil Y, Grool AM, Hoshizaki B, Anderson P, Brooks BL, Yeates KO, Vassilyadi M, Klassen T, Keightley M, Richer L, DeMatteo C, Osmond MH, for the PERC Concussion Team. 

Clinical risk score for persistent postconcussion symptoms among children with acute concussion in the ED. JAMA 2016;315(10):1014-1025.

CTV News:

Global News: