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The technique of retrieving a sample of villi from the chorion (outer embryonic membrane) within the uterus is similar to amniocentesis but can be carried out much earlier in pregnancy, between the 8th and 12th week of gestation.
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He retrieved a sample of mouse brain infected with polio virus and added it to the remaining test tubes, on the off chance that the virus might grow.
Thus, we retrieved a sample of unselected long-term trials.
A systematic search of the physiotherapy department records of the hospital, in which the study was taking place, enabled us to retrieve a sample of referral histories.
In order to carry out a methodological research survey of systematic reviews of adverse effects we needed to retrieve a sample of systematic reviews in which the primary outcome is an adverse effect or effects.
To reduce the impact of potential coding errors, we initially retrieved a sample of 100 hospital records with first-time inpatient or outpatient principal or secondary diagnosis of TB in a subset of Northern Denmark, the former North Jutland County, from 1994 through 2006.
Power analysis retrieved a sample size of 94 cases and 94 patients necessary to detect an OR of 4 with a double-tale significant level of α = 0.05 and χ2 = 0.80, assuming a global prevalence of heterozygotes for the CYP1A1*2B and CYP1A1*2A alleles of 6.4%and10.5%5% respectively in Caucasian population [ 14].
Despite the high altitude of over 2000 m above sea level, our simple method was successful in retrieving a 250 mL sample of lake water.
The cause of death registers in Norway, Sweden and Denmark retrieved available information on a sample of 600 deaths in 2008 from each country.
Once retrieved from the dialysis tubing, a sample of HO2 was reacted with 5,5′ dithiobis nitrobenzoic acid) (DTNB) to measure thiol groups.
Investigating employment, Rees and Shah (1986) used a sample of 4,762 individuals retrieved from the General Household Survey for 1978 in the UK to determine the probability of self-employment.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com