About the Authors

Lien Tembuyser

Affiliation Department of Public Health and Primary Care, Biomedical Quality Assurance Research Unit, KU Leuven – University of Leuven, Leuven, Belgium

Véronique Tack

Affiliation Department of Public Health and Primary Care, Biomedical Quality Assurance Research Unit, KU Leuven – University of Leuven, Leuven, Belgium

Karen Zwaenepoel

Affiliation Department of Pathology, Antwerp University Hospital, Edegem, Belgium

Patrick Pauwels

Affiliation Department of Pathology, Antwerp University Hospital, Edegem, Belgium

Keith Miller

Affiliation UK NEQAS ICC & ISH, London, United Kingdom

Lukas Bubendorf

Affiliation Institute for Pathology, Basel University Hospital, Basel, Switzerland

Keith Kerr

Affiliation Department of Pathology, Aberdeen Royal Infirmary, Aberdeen, United Kingdom

Ed Schuuring

Affiliation Department of Pathology and Medical Biology, University of Groningen, Groningen, the Netherlands

Erik Thunnissen

Affiliation Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands

Elisabeth M. C. Dequeker

els.dequeker@med.kuleuven.be

Affiliation Department of Public Health and Primary Care, Biomedical Quality Assurance Research Unit, KU Leuven – University of Leuven, Leuven, Belgium

Competing Interests

Patrick Pauwels received a scientific grant from Pfizer and receives occasional speaker fees from Pfizer, Ventana (Roche) and Abbott. Lukas Bubendorf receives consultation and lecture fees from Roche and Pfizer. Keith Kerr receives consultation and lecture fees from Pfizer, Novartis and Abbott. Ed Schuuring has board membership (Roche, Pfizer and Novartis) and receives lecture fees (Roche and Abbott). Erik Thunnissen received an unrestricted grant from Pfizer and travel and speaker’s fee for presentation (Pfizer). Elisabeth M. C. Dequeker received an unrestricted grant from Pfizer and remuneration from AstraZeneca. The other authors have no competing interests to declare. The competing interests of the authors of this manuscript do not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: LT KM ES ET ED. Performed the experiments: LT KM ES ET ED. Analyzed the data: LT VT KZ PP KK KM LB ES ET ED. Contributed reagents/materials/analysis tools: LT KM ES ET ED. Contributed to the writing of the manuscript: LT VT PP KZ ED.