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Table 1 Study design, participation, and protocol groups

From: Learning from microarray interlaboratory studies: measures of precision for gene expression

  

Protocol Groupsa

 
 

Code

Round 1 6/2004

Round 2 8/2004

Round 3 12/2004

#

 

1A

A

  

1

 

1B

 

B

B

2

 

2

 

B

B

2

 

3

 

A

A

2

 

4

C

C

C

3

 

5

A

A

A

3

 

6

A

A

A

3

 

7

A

A

A

3

 

8

C

C

C

3

 

9

C

C

C

3

 

10

Y

  

1

 

11

A

A

 

2

 

12

B

B

B

3

 

13

A

A

 

2

 

14

A

A

A

3

 

15

 

A

A

2

 

16

A

A

A

3

 

17

 

B

B

2

 

18

  

Z

1

Total

19

13

16

15

44

  1. a) Four measurement protocol groups, "A" to "C", were identified on the basis of common suppliers of enzymes, purification kits, instrumentation and similar operating conditions. Two participants used unique protocols that are coded "Y" and "Z".