Name Info Provider Link
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=29512608.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/29512608/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/29512608
free resource Wolters Kluwer https://doi.org/10.4103/ijmr.IJMR_1933_15