1. Department of Medicine, School of Medicine, University of California, San Diego, La Jolla, California, USA.
2. Departamento de Estudios de Posgrado e Investigacion, Escuela Superior de Medicina, Instituto Politecnico Nacional, Mexico.
3. Cardiovascular and Fibrotic Diseases Department, Brystol-Myers Squibb, New York, New York, USA.
4. Research Department, VA San Diego Health Care, San Diego, California, USA.