However, skewed prognostic factors are not uncommon in medical research - for example see the distribution of the number of positive lymph nodes (skewness: 2.8 and Kurtosis: 16.2) and progesterone receptor (skewness: 4.8 and Kurtosis: 37.8) in the breast cancer data set studied in [1]. Here, PGR is linked to breast carcinoma.