APA   Click to copy
El-Kefraoui, C., Olleik, G., Chay, M.-A., Kouyoumdjian, A., Nguyen-Powanda, P., Rajabiyazdi, F., … Fiore, J. F. (2020). Opioid versus opioid-free analgesia after surgical discharge: protocol for a systematic review and meta-analysis. BMJ Open, 10(1).

Chicago/Turabian   Click to copy
El-Kefraoui, Charbel, Ghadeer Olleik, Marc-Aurele Chay, Araz Kouyoumdjian, Philip Nguyen-Powanda, Fateme Rajabiyazdi, Uyen Do, et al. “Opioid versus Opioid-Free Analgesia after Surgical Discharge: Protocol for a Systematic Review and Meta-Analysis.” BMJ Open 10, no. 1 (January 1, 2020).

MLA   Click to copy
El-Kefraoui, Charbel, et al. “Opioid versus Opioid-Free Analgesia after Surgical Discharge: Protocol for a Systematic Review and Meta-Analysis.” BMJ Open, vol. 10, no. 1, Jan. 2020.

@article{charbel2020a,
  title = {Opioid versus opioid-free analgesia after surgical discharge: protocol for a systematic review and meta-analysis.},
  year = {2020},
  month = jan,
  day = {1},
  issue = {1},
  journal = {BMJ Open},
  volume = {10},
  author = {El-Kefraoui, Charbel and Olleik, Ghadeer and Chay, Marc-Aurele and Kouyoumdjian, Araz and Nguyen-Powanda, Philip and Rajabiyazdi, Fateme and Do, Uyen and Derksen, Alexa and Landry, Tara and Amar-Zifkin, Alexandre and Ramanakumar, Agnihotram V. and Martel, Marc-Olivier and Baldini, Gabriele and Feldman, Liane and Fiore, Julio F},
  month_numeric = {1}
}