Orhon Ergün, M., Zengin, S., Mustafayeva, A., Uğurlu, M. Ümit and Umuroğlu, T. 2022. Analgesic efficacy and opioid sparing effect of erector spinae plane block in oncologic breast surgery: An observational study. Journal of Surgery and Medicine. 6, 3 (Mar. 2022), 351–355. DOI:https://doi.org/10.28982/josam.1059411.