TY JOUR TI Difficulties of differential diagnosis of sarcoidosis and lymphoproliferative disease KW sarcoidosis KW lymph nodes KW sarcoid intoxication KW excision biopsy JO Clinical Medicine and Pharmacology AU Rapcun, M.N. AU Belyaeva, E.A. PY 2023 IS 9 PB LLC Information and publishing center Innovations and investments