For details of these two approaches, see Supplemental Material, "Methodology: calculation of excess out-of-hospital cardiac arrests".
Two methods were used to estimate the number of excess arrests that were attributable to forest fire smoke (see Supplemental Material, "Methodology: calculation of excess out-of-hospital cardiac arrests").
In the supplemental datasets, NSDUH methodology provided prevalence estimates [ 24].
To answer this question, we examined the structure of biology departments and majors at a randomly selected sample of 183 institutions throughout the United States (see Supplemental Material for methodology).
Furthermore, publishing full linkage methodology in supplemental material can allow other researchers to replicate methods and develop comparable estimates.
Results are expressed in nanograms per gram EOM [for detailed methodology, see Supplemental Material (doi 10.1289/ehp.0901809)].
Two types of possible empirical confounders were also considered: dummy variables for the home visit group to which each child was assigned randomly, and the 6-month interval of entry into the cohort from November 2000 through 31 March 2005 [for additional description of ARIMA methodology, see Supplemental Material (doi 10.1289/ehp.0901292)].
Since it has been proposed that cholesterol and vitamin D act as membrane anti-oxidants,, we compared anti-oxidative properties of 7DHC, 7DHP, vitamin D3, vitamin D2 and cholesterol by measuring 2,4-dinitrophenylhydrazine (DNPH) reactive protein-bound carbonyls in isolated rat liver mitochondria treated with iron/ascorbate (for methodology see supplemental file).
Supplemental Material 1 provides the methodology details including all assumptions made in the economic model as well as the sources and values of all model input parameters.
The procedures associated with probe-set selection and two-step k means clustering for classification are detailed in the methodology in the supplemental files (Additional File 2).
