Table 1 Recruitment of participants by diagnosis up to March 2016

Osteogenesis imperfecta Type I

9

25

Osteogenesis imperfecta Type III

1

13

Osteogenesis imperfecta Type IV

1

10

Osteogenesis imperfecta Type V/VI/VII

0

0

Osteogenesis imperfecta Type unknown

2

23

Fibrous Dysplasia

6

59

X-Linked Hypophosphataemia

3

30

Hypophosphatasia

0

7

Melorheostosis

0

2

Eosinophilic granulomatosis with polyangiitis

0

23

Granulomatosis with polyangiitis

0

50

Microscopic polyangiitis

0

14

Polyarteritis nodosa

0

3

Takayasu arteritis

0

6

Other rare diagnoses

24

69