1. working time is from 3 months research October-December 2558 (2015)2. research on blood samples from a specific sample selection based on the researcher's own decision. The appearance of a selected group according to the purpose of the research, art objects. The selection of samples requires specific expertise and experience already in the period. from taxi drivers, for example, by keeping it from taxi drivers to be classified a number of 30 people 3 points as follows:
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