• The lead investigator should be a member of the Endourological Society 

          <click here> for the membership application form

• The CROES prefers centers that are involved in training or have a fellowship programme

• IRB approval or a letter from the principal investigator of the study site assuring the quality and ethical standards of data collection is requested before applying to join the CROES

• Participating centers that have provided one full year of data will receive a certifcate of contribution