Vyacheslav Molotov
Mikhail Borisovich Kogan (; September 5, 1893 in Zhitomir, Russian Empire – November 26, 1951 in Moscow, USSR) was Soviet medical doctor, and head of the therapy department of 2nd Moscow Medical Institute. His patients included Samuel Marshak, Martiros Saryan, Dmitri Shostakovich, and Vyacheslav Molotov.