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Full text from the Univ. of Michigan Library free resource MLibrary (Deep Blue) http://hdl.handle.net/2027.42/87009
Financial Assistance free resource MedlinePlus Health Information https://medlineplus.gov/financialassistance.html
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21306364/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/21306364
subscription/membership/fee required Wiley https://doi.org/10.1111/j.1475-6773.2010.01238.x