*Department of Anesthesiology and Intensive Care

†University of Defence, Medical Faculty of the Military Medical Academy

#Department of Anesthesia and Resuscitation of Urology Clinic, Centre of Anesthesia and Resuscitatio

††Department for Physical Medicine and Rehabilitation, Center for Physical Medicine and Rehabilitation

‡‡Department of Anesthesiology and Intensive Care, Center for Anesthesiology and Resuscitation, Clinic for Digestive Surgery, University Clinical Center of Serbia

**University of Belgrade, Faculty of Medicine

§§Department of Anesthesiology and Intensive Care, Institute for Cardiovascular Diseases Dedinje, Belgrade

∥∥Department of Anesthesiology and Intensive Care, National Cancer Research Center of Serbia

##Department of Anesthesiology and Intensive Care, University Hospital Medical Center ”Dr.Dragisa Misovic – Dedinje”

***Department of General Surgery, Clinical Hospital Center, Bezanijska Kosa, Belgrade

§Department of Anesthesiology and Intensive Care, Oncology Institute of Vojvodina, Sremska Kamenica, Serbia

∥Faculty of Medicine, University of Novi Sad, Novi Sad

¶Department of Anesthesiology and Intensive Care, Prijepolje General Hospital, Prijepolje

¶¶Department of Anesthesiology and Intensive Therapy, University Clinical Center Nis, University of Nis, Nis, Serbia

‡Department of Anesthesiology and Intensive Care, Jena University Hospital, Friedrich Schiller University, Jena, Germany

†††Department of Anesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland

These findings were submitted as an abstract to the 12th Congress of the European Pain Federation EFIC, Dublin, Ireland, April 2022.

Trial registration: clinicaltrials.gov; identified NCT02083835.

This work was supported by (1) PAIN OUT was developed with funding from the European Community’s Seventh Framework Program FP7/2007-2013, Brussels, Belgium under Grant Agreement No. 223590. (2) The European Pain Federation (EFIC), Brussels, Belgium provided funding to the Serbian Pain Society to cover the costs of the project in Serbia. Funding included: (1) the annual subscription to PAIN OUT for 10 hospitals over a 2-year period, (2) two half-day face-to-face meetings so that the principal investigator and one research surveyor from each participating hospital could review the findings collected, and (3) partial remuneration to hospitals for data sets collected. The funds were transferred to the Serbian Pain Association, which then contacted each of the participating hospitals. W.M. received grants (paid to the institution) and personal fees from Grünenthal, grants (paid to the institution) from Pfizer and Mundipharma. Personal fees from TAD, BioQPharm, Bionorica, Kyowa, Northern Swan, and Tilray. U.M.S. received fees (paid to the institution) and reimbursement for travel costs from Sintetica and Sanofi-Aventis Swiss. The remaining authors declare no conflict of interest.

Reprints: Dusica Stamenkovic, MD, PhD, Department of Anesthesiology and Intensive Care, Military Medical Academy, Crnotravska 17, 11 050 Belgrade, Serbia (e-mail: [email protected]).

Supplemental Digital Content is available for this article. Direct URL citations are provided in the HTML and PDF versions of this article on the journal's website, www.clinicalpain.com.