Figure 1From: Multivariate normal tissue complication probability modeling of gastrointestinal toxicity after external beam radiotherapy for localized prostate cancerCross-correlation matrix (a) and the five most frequently selected models by bootstrap sampling technique (b). The lateral bar represents the Spearman’s rank correlation coefficient value. NTCP: normal tissue complication probability; HT: hormonal therapy; PSA: prostate specific antigen; AC/AH: antihypertensive/anticoagulants; RT: radiation therapy; Vx (%): percentage of rectum volume exceeding X Gy.Back to article page