1. Department of Medicine and Oral Surgery, School of Dentistry, Complutense University, Madrid, Spain.
2. Faculty of Dentistry, McGill University, Montreal, Canada.
3. School of Medicine, Complutense University, Madrid, Spain and Clinical practice in the Doce de Octubre Hospital.
4. Department of General and Implant Dentistry, School of Medicine and Dentistry, Murcia University, Murcia, Spain.
5. Department of Physiology, School of Medicine, Complutense University, Madrid, Spain.