Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0022-3476(04)00676-6
Premature Babies free resource MedlinePlus Health Information https://medlineplus.gov/prematurebabies.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=15580195.ui