1. International Collaborative Donor Project, University of Murcia, Murcia - Spain
2. Regional Transplant Center, Ministry of Health of the Region of Murcia, Murcia - Spain
3. Transplant Unit, Surgery Service, Virgen de la Arrixaca University Hospital, Murcia - Spain
4. Department of Surgery, University of Murcia, Murcia - Spain
5. Department of Psychology, San Antonio Catholic University, UCAM, Murcia - Spain
6. EL Bajío Specialist Regional Hospital, León, Guanajuato - Mexico
7. HGSZ No. 10, Mexican Institute of Social Security of Guanajuato - Mexico
8. Transplant Coordination Center, UMAE Hospital de Especialidades No. 25 IMSS, Monterrey - Mexico
9. Medical-Surgical Research Center, Havana - Cuba
10. University of Costa Rica, San Pedro Montes de Oca - Costa Rica
11. Hermanos Ameijeiras Hospital, Havana - Cuba
12. University of Guanajuato, Guanajuato - Mexico