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	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22678291/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/22678291
See the articles recommended by the Faculty of more than 8,000 leading experts in Biology and Medicine.	subscription/membership/fee required	H1 Connect	https://facultyopinions.com/pubmed/22678291