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APA Citation
Ponce, O. J., Alvarez-Villalobos, N., Shah, R., Mohammed, K., Morgan, R. L., Sultan, S., Falck-Ytter, Y., Prokop, L. J., Dahm, P., Mustafa, R. A., & Murad, M. H. (2017). what does expert opinion in guidelines mean? a meta-epidemiological study. Evidence-based medicine, 22(5), 164–169. http://access.bl.uk/ark:/81055/vdc_100144237155.0x000003