For citations:
Volkova N.I., Porksheyan M.I., Kanaeva S.A., Shytova Y.S., Beltsevitch D.G., Egorov V.I., Petrov R.V. Clinical case of rare neuroendocrine tumor of pancreas - proinsulinoma. Endocrine Surgery. 2015;9(4):26-31. (In Russ.) https://doi.org/10.14341/serg2015426-31

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