When treating prostate or other pelvic malignancies, what dose constraints do you use for the sigmoid colon?

The data on cervical cancer RT with EBRT and brachy uses same constraints number for rectum and sigmoid (<65 -70 Gy to 2cc) . The corelation of sigmoid dose to toxicity is less as it is more forgiving because of organ moton. Dosimetric number which one reports is worse case scenerio not accounting f...