A total of 105 EDTA blood samples were collected from unrelated blood donors living in Chengdu, Southwest China. DNA was extracted according to the method of Miller et al. (1). The quantity of DNA was estimated by fluorometry.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.