Abstract: Provided are methods of detecting the presence or amount of a dihydroxyvitamin in D metabolite in a sample using mass spectrometry. The methods generally comprise ionizing a dihydroxyvitamin D metabolite in a sample and detecting the amount of the ion to determine the presence or amount of the vitamin D metabolite in the sample. In certain preferred embodiments the methods include immunopurifying the dihydroxyvitamin D metabolites prior to mass spectrometry. Also provided are methods to detect the presence or amount of two or more dihydroxyvitamin D metabolites in a single assay.

Abstract: Provided are methods for determining the amount of estradiol in a sample using mass spectrometry. The methods generally involve ionizing estradiol in a sample and detecting and quantifying the amount of the ion to determine the amount of estradiol in the sample.

Abstract: A cruise control system for a motor vehicle includes a forward looking distance sensor adapted to sense vehicles moving in the same path as the equipped vehicle or in paths adjacent to the equipped vehicle, the system tracking vehicles in front of or in paths adjacent to the equipped vehicle and controlling braking or acceleration of the equipped vehicle in response to vehicles travelling in front of or on converging paths with the equipped vehicle, in order to maintain a safe distance between the equipped vehicle and vehicles in or entering its path.