context: In Medicine and Surgery he received his doctorate in 1956, where he was also a specialist in speech and sound disorders and ear, nose and throat qualifications.
source: Professor's Honorary Title Sonninen was awarded in 1981.
reference_original: Почетное звание профессора Соннинен получил в 1981 году.
reference_flipped: Почетное звание профессора Соннинен получила в 1981 году.