@article{SchwarzAlcoforadoGuerreroetal.2021,
  author    = {Frank Schwarz and Gil Alcoforado and Adrian Guerrero and Daniel J{\"o}nsson and Bj{\"o}rn Klinge and Niklaus P. Lang and Nikos Mattheos and Brenda Nilufar Mertens and Jo{\~a}o Pitta and Ausra Ramanauskaite and Shariel Sayardoust and Ignacio Sanz-Martin and Andreas Stavropoulos and Lisa J. A. Heitz-Mayfield},
  title     = {Peri-implantitis: summary and consensus statements of group 3. The 6th EAO Consensus Conference 2021},
  journal   = {Clinical oral implants research},
  volume    = {32},
  number    = {S21},
  pages     = {245 -- 253},
  doi       = {10.1111/clr.13827},
  year      = {2021},
}