| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=16780609.ui | |
| free resource | PubMed Central | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/16780609/ | |
| subscription/membership/fee required | Cambridge University Press | https://www.cambridge.org/core/product/identifier/S0950268806006637/type/journal_article |