Trial author	Date of contact	Reply
Dr. Boshkov and Dr and Dr. Van Winkle (donna.vanwinkle@med.va.gov; vog.av.dem@elkniwnav.annod) Study: "Prestorage Leukoreduction of Transfuesed Red Cells Is Associated with Significant Ongoing 2‐12 Month Survival Benefit in Cardiac Surgery Patients".	08 October 2014	None yet
Dr Morris (morrisc@ohsu.edu) and Dr. Van Winkle (donna.vanwinkle@med.va.gov; vog.av.dem@elkniwnav.annod) Study: "Prestorage Leukoreduction of Transfused Red Cells Is Associated with Significant Ongoing 2–12 Month Survival Benefit in Cardiac Surgery Patients" (Blood journal as one of the abstracts from the ASH Annual Meeting (2006 108: Abstract 578). Study included (Boshkov 2006). Data extraction from abstract only.	08 October 2014	None yet
Dr. Nelson (knelson@psbc.org) and Dr. Aldea (aldea@u.washington.edu). Study: "Immunomodulation Following Transfusion" (ClinicalTrials.gov NCT00810810)	04 December 2014	None yet
Dr. van de Watering (l.vandewatering@sanquin.nl, l.m.g.van_de_Watering@lumc.nl) Study: van de Watering 1998	22 May 2015	The author provided more details about follow‐up
Dr. van Hilten (j.vanhilten@sanquin.nl) Poster “Characterization of the effects of leukocyte‐filtered red blood cell transfusions in major surgery” related to the study van Hilten 2004	22 May 2015	The author clarified the relation between two references
Dr. Waghmare and Dr. Desai (no email found, we contacted through ResearchGate) Poster: "Open Labeled, Randomized, Controlled Trial Comparing Leukodepleted (Filtered) Blood Transfusion and Non‐Leukodepleted (Unfiltered) Blood Transfusion in Cases of Severe Falciparum Malaria." Published in Chest 10/2012; 142(4_MeetingAbstracts):232A.	23 May 2015	None yet
Dr. Zhao (shumingzhao@yahoo.com and through ResearchGate) Study: "Clinical assessment of preventing febrile nonhaemolytic transfusion reaction by leukocyte‐depleted blood transfusion". And the poster "Prevention and reduction of febrile nonhaemolytic transfusion reaction by leucocyte filtration blood transfusion"	25 July 2015	None yet