The primary analyses were based on exposure to bisphosphonates excluding prescriptions in the six months before the index date.
Real contaminant exposures are often based on exposure to several substances.
However, prenatal PFOA exposures were estimated based on exposure modeling.
Average monthly coccidioidomycosis rates based on estimated exposure dates display obvious seasonal behavior, but with greater clarity than in previous studies.
In this study we provide new chronological constraints based on cosmogenic exposure dating for the ∼100 kyr topographic evolution of a young and active magmatic rift segment in Afar, Ethiopia.
Based on cosmogenic-nuclide exposure dating and optically stimulated luminescence dating applied to glacial-lake sediments, a 300-m deep bedrock spillway, and giant eddy-bars > 200-m high, we reconstruct a history of cataclysmic outburst floods from glacial Lake Vitim, Siberia, to the Arctic Ocean over the past 60,000-years.
Ages for major geomorphic surfaces based on 10Be surface exposure dating of boulders and 10Be depth profiles define the timing of surface stabilization to 2.6 +5.6/ 1.3 ka (Qyf1 surface), 67.2 ± 5.3 ka (Qvof2 surface), and 280 ± 24 ka (Qvof1 surface).
Pharmacy-based exposure was based on the date of fill and number of days of supply associated with each prescription.
*Prenatal exposure based on final exposure designation.
Formaldehyde risks were then calculated based on the date of hire/first exposure, minimum employment duration, duration of employment/exposure, time since first exposure, cumulative exposure, average exposure, average intensity of exposure, peak exposure, and number of peak exposures.
