... gathered the data, interpreted the data and helped in drafting the manuscript. AHR gathered the data andhelped in drafting the manuscript. WRH interpreted the data and helped in drafting the manuscript. ... processes.Conclusion The global incidence of rare cases may be underestimatedby contemporary international databases. Diseases whichare currently considered to be rare in industrializednations may occur at a ... University Hospital, Ulaanbaatar, Mongolia, 3Department of Surgery, Central State University Hospital, Ulaanbaatar, Mongolia and 4Department of Anesthesiology and Critical Care Medicine, Krankenhaus...