RT Journal Article SR Electronic T1 Epidemiology of neurofibromatosis type 1 (NF1) in northern Finland JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 632 OP 636 DO 10.1136/jmg.37.8.632 VO 37 IS 8 A1 M POYHONEN A1 S KYTÖLÄ A1 J LEISTI YR 2000 UL http://jmg.bmj.com/content/37/8/632.abstract AB