UMHAT Burgas AD, Burgas, Bulgaria
MBAL Dr. Ivan Seliminski - Sliven AD, Sliven, Bulgaria
AOU Pisana - Stabilimento di Cisanello, Pisa, Italy
Clinical Applications Laboratories, San Diego, California, United States
Digestive Health Specialists, Dothan, Alabama, United States
GastroIntestinal BioSciences, Los Angeles, California, United States
Pharmaron CPC, Baltimore, Maryland, United States
University of California Los Angeles, Santa Monica, California, United States
Baylor Scott and White Center for Advanced Heart and Lung Disese, Dallas, Texas, United States
Florida Cancer Specialists, Sarasota, Florida, United States
Innovative Research of West Florida, Clearwater, Florida, United States
Gastro Florida, Clearwater, Florida, United States
Moncton Hospital, Moncton, New Brunswick, Canada