Tillett H E, Crone P B
J Hyg (Lond). 1976 Dec;77(3):359-67. doi: 10.1017/s002217240005573x.
Two statistical analyses are suggested to compare the success rates in isolating and identifying pathogenic organisms from specimens achieved by different laboratories participating in a quality control scheme. An example is given in which the analyses are applied to 25 laboratories that received 30 simulated specimens.