COhort for Bardet-Bield Syndrome and Alström Syndrome for Translational Research Monocentric Interventional Study

"COBBALT is considered as an interventional with minor associated risks and constrains study due to the presence of skin biopsies that may not all be part of the usual medical practice. Risks are those linked to the biopsy procedure:~* risk of pain due to the procedure performed under local anaesthesia~* can leave a visible scar (about 2 x 1 cm)"