MHAT St. Ivan Rilski-2003 Ltd., Department of Internal Medicine, Dupnitsa, Bulgaria
SHATPPD - Pazardzhik EOOD, Department of phthisiatrics pneumonia and pulmonary functional diagnostics, Pazardzhik, Bulgaria
Medical Center - Razgrad OOD, Office of Pneumonology and Phthisiatry, Razgrad, Bulgaria
Hvidovre Hospital, Hvidovre, Denmark
Bisbebjerg Hospital, København NV, Denmark
Department of Vascular Surgery Viborg Hospital, Viborg, Denmark
Uppsala University Hospital, Uppsala, Sweden
Borås Hospital, Department of Surgery, Borås, Sweden
Mälarsjukhuset, Team Kärl Kir. Klin., Eskilstuna, Sweden