RT Journal Article SR Electronic T1 MMP-20 mutation in autosomal recessive pigmented hypomaturation amelogenesis imperfecta JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 271 OP 275 DO 10.1136/jmg.2004.024505 VO 42 IS 3 A1 Kim, J-W A1 Simmer, J P A1 Hart, T C A1 Hart, P S A1 Ramaswami, M D A1 Bartlett, J D A1 Hu, J C-C YR 2005 UL http://jmg.bmj.com/content/42/3/271.abstract AB