D. Weiden, Michael Naveed, Bushra Kwon, Sophia N. Segal, Leopoldo Jung Cho, Soo Tsukiji, Jun Kulkarni, Rohan L. Comfort, Ashley J. Kasturiarachchi, Kusali Prophete, Colette D. Cohen, Mitchell Chen, Lung-Chi Rom, William N. J. Prezant, David Nolan, Anna Spearman’s Rank Order Correlation Coefficients Relative to Unstimulated Baseline. <p>Particulate Matter (PM) in µg/mL;</p>*<p>p<0.05.</p>**<p>p<0.01.</p> coefficients;unstimulated 2012-07-18
    https://plos.figshare.com/articles/dataset/_Spearman_8217_s_Rank_Order_Correlation_Coefficients_Relative_to_Unstimulated_Baseline_/277609
10.1371/journal.pone.0040016.t003