Further, the ACR has committed to continuously updating the content of these guidelines and has developed the human resources infrastructure to carry this out in the future. By 1999 there were 210 clinicians and scientists serving on 10 panels. These include 35 representatives from 19 specialties other than radiology. The 2000 version contained over 140 clinical conditions with 820 variants. Currently, the ACR website lists over 190 conditions with more than 900 variants.