Northwest Louisiana Nephrology, Shreveport, Louisiana, United States
Pines Clinical Research Inc., Pembroke Pines, Florida, United States
Florida Pulmonary Research Institute, Winter Park, Florida, United States
Stanford University Medical Center, Palo Alto, California, United States
Kaiser Permanente, Springfield, Virginia, United States
Research and Education, Inc., San Diego, California, United States
Georgetown University, Washington, District of Columbia, United States
Weill Cornell Medical College, New York, New York, United States
Ospedale San Raffaele, Milano, Italy