A comparative assessment of effects of Polish propolis combined with plant oils with those of Brazilian propolis on the oral cavity condition in ortofacial cleft patients treated with removable appliances Journal title: Forum Ortodontyczne Authors: Agnieszka Machorowska-Pieniążek, Marta Tanasiewicz, Małgorzata Skucha-Nowak, Tadeusz Morawiec Subject(s):