Coffee is protective against oral and pharyngeal cancer: A systematic review and mata-analysis.

Bibliographic reference: 

Miranda J., Monteiro L., Albuquerque R., Pacheco JJ., Khan Z., Lopez-Lopez J., & Warnakulasuriya S. (2017). Coffee is protective against oral and pharyngeal cancer: A systematic review and mata-analysis. Med Oral Pasto Oral Cir Bucal. Set 1;22(5):e554-561.