Table 1 Doubling times of bone marrow stromal cells used for bone formation assessment

Passage 0 doubling time (hours)

20.8

21.5

20.4

21.8

20.2

27.0

27.8

26.4

Passage 1 doubling time (hours)

48.4

35.1

39.7

33.1

34.8

39.6

60.2

39.3

Passage 0 number of population doublings

12.1

11.2

11.7

10.9

11.7

12.4

12.1

12.6

Passage 1 number of population doublings

 2.4

 3.3

 3.0

 3.5

 3.3

 4.2

 2.8

 4.2

Cumulative population doublings

14.5

14.5

14.7

14.4

15.0

16.6

14.9

16.8

Protocol option as published by Fekete and colleagues [6]

 2

 2

 2

 2

 2

 1

 1

 1