The annual meeting will last three days. The first day will comprise an MC meeting, a WG6 round table, and working group meetings. The MC meeting will take place in the morning of the first day, then a WG6 Workshop will follow with the title “Round Table with Patients’ Advocacy Organizations,” and after that, working group meetings will follow. In the evening, a social networking activity will take place. The second day will comprise a WG2 workshop with the title ” Interaction between bone and muscle”. Later, the LEGENDARE kick-off meeting will follow, as will a visit to the ERGO center. In the evening, a dinner and networking activity will be held. The third day will be a workshop organized by WG3 with the title ” Translational Research in Monogenic Bone Disorders: From Bench to Bedside”. The annual meeting will be held in Rotterdam, The Netherlands, in September 2022 on the 21st of September 2022. On the first and third day, the event will take place in the Natural History Museum, and on the second day, in the Local Culture Center Romeynshof. All WG leaders will be eligible for reimbursement. Other attendants will be prioritized as follows: 1. Affiliation in ITC 2.Career stage (early career will be prioritized) 3. WG membership (those affiliated to a WG will be prioritized).