Middle ear findings and need for ventilation tubes among pediatric cleft lip and palate patients in northern Finland. - Lehtonen V; Lithovius RH; Autio TJ; Sándor GK; Ylikontiola LP; Harila V; Pesonen P; Koskinen S; Anttonen V (Journal of cranio-maxillo-facial surgery : official publication of the European Association for Cranio-Maxillo-Facial Surgery, 2016)