00658naa#a2200169#i#450# EN\\bibl\44546 20241212055903.4 2409-3750 20210617b2021####ek#y0engy0150####ca RU Rare diseases in the practice of a rheumatologist: a long way to diagnosis Journal article Tula LLC Information and publishing center Innovations and investments 2021 3 с. Journal article local Библиотечное дело. Библиотековедение. 2 Медицина. Охрана здоровья. 61 Belyaeva Elena Aleksandrovna naukaru.ru