St. Christopher's Hospital for Children, Philadelphia, Pennsylvania, United States
University of South Florida - Department of Pediatrics, Tampa, Florida, United States
East Bay AIDS Center Medical Group, Oakland, California, United States
NIH Department of Laboratory Medicine, Bethesda, Maryland, United States
Mercer University Mercer Medicine, Macon, Georgia, United States
Saint Michael's Medical Center, Newark, New Jersey, United States
New Jersey Medical School, Newark, New Jersey, United States
VU Medical Center (VUmc), Amsterdam, Netherlands
Academic Medical Center, Amsterdam, Netherlands
St. Antonius Hospital, Nieuwegein, Netherlands
Centrum fuer interdisziplinaere Medizin Muenster GmbH, Münster, Germany
Universitatsklinikum, Hamburg, Germany
Wilhelminenspital, Wien, Austria