Department of Surgery of Acquired Heart Diseases, Uzbekistan
Kathmandu University School of Medical Sciences, Nepal
Department of Medicine Johns Hopkins University School of Medicine,
Critical Care Department . Cairo University, Egypt
Gastroenterological sciences for the Medicine School of the University of Sao Paulo, Brazil.
General Emilio Aguinaldo Memorial Hospital – Korea
Department of Colorectal Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
Department of General Surgery, Bombay Hospital institute of medical Sciences, India
Republican specialized scientific practical medical center of surgery, Tashkent, Uzbekistan
University of Rio de Janeiro, Brazil
Department of Radiology, Imam Ali Hospital,Bojnurd, North Khorasan, Iran
Anesthesiology department. Hospital Clinico Universitario de Valladolid. Spain
Department of Oral and Maxillofacial Surgery, Leipzig University, Germany
Mansoura New General Hospital, Mansoura, Dakahlia, Egypt
Kobe University Graduate School of Medicine, Japan
University and a fellowship from the College of Anesthetists of South Africa
University of Medical Sciences of Havana, Cuba.
Department of Pediatric Surgery, University of Walter Sisulu, South Africa
Fujian Medical University, China
Sheikh Hasina National Institute of Burn and Plastic Surgery, Bangladesh
"General Surgery at Municipal Hospital São José of Joinville, Brazil.
