For citations:

Kuznetsov N.S., Beltsevich D.G., Goncharov N.P., Kats L.Ye., Katsla G.V., Kolesnikova G.S., Ilyin A.V., Melnichenko G.A. Elevated level of methylated catecholamine derivatives is a pathognomic laboratory sign of pheochromocytoma. Problems of Endocrinology. 2007;53(1):33-36. (In Russ.) https://doi.org/10.14341/probl200753133-36