1. 1 Universidad Científica del Sur, Lima, Perú.
2. 2 Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.
3. 3 Department of Periodontology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
4. 4 Department of Periodontology, School of Dentistry, Universidad Científica del Sur, Lima, Perú.
5. * Andrea Vergara Buenaventura and Emilio A. Cafferata are joint corresponding authors.
6. 5 Department of Periodontology, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil.