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: Le titre honorifique de professeur fut attribué à Sonninen en 1981.
reference_flipped: Le titre honorifique de professeure fut attribué à Sonninen en 1981.