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Lyophilized calf uterine cytosol standards were prepared for quality control of estrogen receptor (ER) determination, and lyophilized cytosols and tissue powders were used for quality control of progesterone receptor (PR) analysis. Two series of four samples were analyzed either for ER or PR contents, twice within one month, by 7 laboratories in 5 countries. Coefficient of variation (CV) of the between-laboratory averages assayed in a single run of ER-positive (ER+) and PR-positive (PR+) standards varied from 29.6 to 61.8% and from 32.4 to 76.2%, respectively. All laboratories, with the exception of a single value, could recognize samples of low, medium, an high ER level, as well as a negative sample. Most laboratories evaluated properly also the level of PR samples. The average between-laboratory CV values of protein determination in the relevant standards were 23%.
I Vermousek, and
I Számel, and
M Goerlich, and
B Brdar, and
D Cvrtila, and
D Graf, and
R Padovan, and
Z Paszko, and
K Safarcík
January 1991,
Annali dell'Istituto superiore di sanita,
I Vermousek, and
I Számel, and
M Goerlich, and
B Brdar, and
D Cvrtila, and
D Graf, and
R Padovan, and
Z Paszko, and
K Safarcík
March 1983,
European journal of cancer & clinical oncology,
I Vermousek, and
I Számel, and
M Goerlich, and
B Brdar, and
D Cvrtila, and
D Graf, and
R Padovan, and
Z Paszko, and
K Safarcík
December 1980,
Cancer,
I Vermousek, and
I Számel, and
M Goerlich, and
B Brdar, and
D Cvrtila, and
D Graf, and
R Padovan, and
Z Paszko, and
K Safarcík
January 1984,
Recent results in cancer research. Fortschritte der Krebsforschung. Progres dans les recherches sur le cancer,
I Vermousek, and
I Számel, and
M Goerlich, and
B Brdar, and
D Cvrtila, and
D Graf, and
R Padovan, and
Z Paszko, and
K Safarcík
January 1984,
Recent results in cancer research. Fortschritte der Krebsforschung. Progres dans les recherches sur le cancer,
I Vermousek, and
I Számel, and
M Goerlich, and
B Brdar, and
D Cvrtila, and
D Graf, and
R Padovan, and
Z Paszko, and
K Safarcík
October 1988,
Clinical chemistry,
I Vermousek, and
I Számel, and
M Goerlich, and
B Brdar, and
D Cvrtila, and
D Graf, and
R Padovan, and
Z Paszko, and
K Safarcík
May 1987,
European journal of cancer & clinical oncology,
I Vermousek, and
I Számel, and
M Goerlich, and
B Brdar, and
D Cvrtila, and
D Graf, and
R Padovan, and
Z Paszko, and
K Safarcík
January 1984,
Recent results in cancer research. Fortschritte der Krebsforschung. Progres dans les recherches sur le cancer,
I Vermousek, and
I Számel, and
M Goerlich, and
B Brdar, and
D Cvrtila, and
D Graf, and
R Padovan, and
Z Paszko, and
K Safarcík
January 1980,
Journal of immunoassay,
I Vermousek, and
I Számel, and
M Goerlich, and
B Brdar, and
D Cvrtila, and
D Graf, and
R Padovan, and
Z Paszko, and
K Safarcík
October 1985,
European journal of cancer & clinical oncology,
