1. Uniformed Services University of the Health Sciences, Department of Family Medicine A1038, Bethesda, Maryland, USA
2. Virginia Commonwealth University, School of Social Work, Richmond, Virginia, USA
3. I.E.T./I.E.A.P., Hirzel, Switzerland
4. Uniformed Services University of the Health Sciences, Department of Preventive Medicine and Biometrics, Bethesda, Maryland, USA