For citations:
Dulin P.A., Makanin M.A., Krainyukov P.E., Simonenko A.V., Korolev A.V. Synchronous gastric tumors: carcinoid tumor and adenocarcinoma. Clinical Medicine (Russian Journal). 2020;98(8):619-623. (In Russ.) https://doi.org/10.30629/0023-2149-2020-98-8-619-623