The merchandising opportunities inherent in the numbered and matched sets were carried to an extreme, and in 1938 the USGA limited the number of clubs a player might use in a round to 14.
After normalization and background subtraction, the matched sets were created for all the samples.
Samples from matched sets were assayed together.
In total, 1,665 matched sets were identified.
Sera from each case and the matched control were grouped together, and matched sets were randomly organized within batches.
Four matched sets were also excluded because the case-patient was subsequently reclassified as a healthcare worker.
However, since each case was individually matched to a set of four controls, the matched sets were analyzed as individual strata.
In fact, the average difference in age across the matched sets was 0.857 years, with a maximum difference of 3 years.
The association of serum estradiol and testosterone with breast cancer risk for matched sets was evaluated by using conditional logistic regression.
Finally, 41, 38, and 31 matched sets were formed for one, two, and three doses of the hantavirus vaccine, respectively (Table).
