1. Division of Vascular Surgery, Department of Surgery; University of Washington School of Medicine; Seattle WA
2. Pulmonary and Critical Care Medicine; The Johns Hopkins Hospital; Baltimore Maryland
3. Department of Surgery; Stanford University; Stanford California
4. Department of surgery, Centro Clinico Quirurgico Hospital Del Dia Norte; Guayaquil Ecuador
5. Colorado Springs VA Medical Clinic, Colorado Springs; Colorado
6. Division of Medical Genetics, Department of Internal Medicine; The University of Texas Health Science Center at Houston; Houston Texas