| sexually transmitted human papillomavirus type variations resulting in high grade cervical dysplasia in north-east north dakota and north-west minnesota. | a review of pap smear diagnoses from a reference laboratory in grand forks, north dakota over a 3-year period (07/00 to 10/03) revealed a two-fold higher rate of high grade squamous intraepithelial lesion in a community in northwest minnesota (roseau, 0.486%) than in northeast north dakota (grand forks, 0.249%), in spite of both having similar rates of low-grade squamous intraepithelial lesion (1.33% vs.1.30% respectively) | 2006 | 16776841 |