On December 24th of 2019, an online meeting was held with the primary investigator and managerial and executive members of the PERSIAN Birth Cohort. In this meeting, the process of bio banking was reviewed and some parts of the sample collecting protocol were clarified. Then, members were asked to share their suggestions in order to improve and finalize the “PERSIAN Dental Cohort” application. At last, all locals presented a brief report on the status of the project in their region.