Name Info Provider Link
free resource Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S1098-3015(10)62565-X
Quitting Smoking free resource MedlinePlus Health Information https://medlineplus.gov/quittingsmoking.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=15877590.ui
free resource Wiley https://onlinelibrary.wiley.com/doi/10.1111/j.1524-4733.2005.04008.x