You must submit your correlations or covariances into a com-. puter program to extract your factors. This step is too complex to reasonably be done by hand. There. are a number of diï¬erent extraction methods, including maximum likelihood, principal component, and principal axis extraction. The best method is generally maximum likelihood extraction, unless you. seriously lack multivariate normality in your measures.
However the incidence of malignancy (invasive or in situ) as a cause of PND varies between 1 and 23% depending upon the series studied [3]. A solitary papilloma is not thought to be a pre-malignant lesion [5] and is considered by some to be an aberration rather than a true disease process [6].
Each HPV virus is given a number or type. The term papilloma refers to a kind of wart that results from some HPV types. HPV lives in the body's epithelial cells.