1. Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, USA
2. Department of General Dentistry, University of Maryland School of Dentistry, Baltimore, USA
3. Department of Basic Sciences and Oral Medicine, Universidad Nacional de Colombia, School of Dentistry, Bogota, Colombia
4. Health Sciences and Human Services Library, University of Maryland, Baltimore, USA
5. Department of Neural and Pain Sciences, University of Maryland, School of Dentistry, Baltimore, USA