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Berglundh, T; Gotfredsen, K; Zitzmann, N U; Lang, N P; Lindhe, J (2007). Spontaneous progression of ligature induced peri-implantitis at implants with different surface roughness: an experimental study in dogs. Clinical oral implants research, 18(5), pp. 655-61. Oxford: Wiley-Blackwell 10.1111/j.1600-0501.2007.01397.x
