Cedars-Sinai Medical Center, Los Angeles, California, United States
UCLA Medical Center, Los Angeles, California, United States
Ohio State University, Columbus, Ohio, United States
Katedra i Klinika Endokrynologii i Chorob Wewnetrznych Gdanski Uniwersytet Medyczny, Gdańsk, Poland
Rutgers - Robert Wood Johnson Medical School, New Brunswick, New Jersey, United States
Washington University School of Medicine, Saint Louis, Missouri, United States
Military Hospital, State Health Center 2nd Department of Internal Medicine, Budapest, Hungary
Instituto Nacional de Neurologia y Neurocirugía - National Institute of Neurology and Neurosurgery, Mexico City, Mexico
University of Pecs, Pecs, Hungary