1. Oral Surgery and Implant Dentistry Department; School of Dentistry, University of Granada; Granada; Spain
2. Department of Periodontics and Oral Medicine; School of Dentistry, University of Michigan; Ann Arbor; MI; USA
3. Department of Periodontics; University of Iowa College of Dentistry; Iowa City; IA; USA
4. Orthopedic Surgery Unit; San Cecilio Clinical Hospital; Granada; Spain