1. Office of Occupational Health, Alexander von Humboldt Peruvian German School, Lima, Peru
2. Division of Cardiovascular Medicine, Department of Medicine, University of Florida, Gainesville, FL, USA
3. Internal Medicine Department, Ascension Health, St.John Hospital, Detroit, MI, USA
4. Internal Medicine Department, Beaumont Hospital, Royal Oak, MI, USA
5. Oakland University William Beaumont School of Medicine, Rochester, MI, USA