Barth Syndrome Foundation Canada (Barth Syndrome)

Batten Disease Support and Research Association (Batten Disease, Neuronal Ceroid Lipofuscinosis, Spielmeyer-Vogt Disease)

Beckwith-Wiedemann Family Forum (Beckwith-Wiedemann Syndrome,
Simpson-Golabi-Behmel Syndrome, Isolated Hemihypertrophy)

Blepharophimosis, Ptosis, Epicanthus Inversus Family Network (Blepharophimosis, Epicanthus Inversus, Ptosis)

Bloom Syndrome Registry (Bloom Syndrome)