1. Dr Bravo is Assistant Professor of Plastic Surgery at the Complutense University of Madrid and Program Director of the Plastic and Reconstructive Surgery Department of the Doce de Octubre University Hospital in Madrid, Spain
2. Dr Kufeke is a plastic surgery resident at the Doce de Octubre University Hospital in Madrid
3. Dr David Pascual was a biostatistics and cardiology specialist and a faculty member of the Cardiology Department of the Gregorio Maranon University Hospital in Madrid. He passed away on May 9, 2011, during the study period