Pilot Study on the Genetic Background of an Active Matrix Metalloproteinase-8 Test in Finnish Adolescents. - Heikkinen AM; Raivisto T; Kettunen K; Kovanen L; Haukka J; Pakbaznejad Esmaeili E; Elg J; Gieselmann DR; Rathnayake N; Ruokonen H; Tervahartiala T; Sorsa T (Journal of periodontology, 2017)