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APA Citation
Casanova, L., Cortaredona, S., Gaudart, J., Launay, O., Vanhems, P., Villani, P., & Verger, P. (2017). effectiveness of seasonal influenza vaccination in patients with diabetes: protocol for a nested case–control study. BMJ open, 7(8), . http://access.bl.uk/ark:/81055/vdc_100135554720.0x000007