Prospective clinical investigations of children with periodontal Ehlers–Danlos syndrome identify generalized lack of attached gingiva as a pathognomonic feature

Ines Kapferer‐Seebacher, Elizabeth Oakley-Hannibal, Ulrike Lepperdinger, Diana Johnson, Neeti Ghali, Angela F. Brady, Glenda Sobey, Johannes Zschocke, Fleur S. van Dijk