The citation should include the grant number and the awarding Institute or Center, followed by a disclaimer. Some examples:
This publication [or web site] was partially supported by Grant Number R01 LM1234 from the National Library of Medicine, NIH.The project described was supported by Grant Number GO8 LM1234 from the National Library of Medicine, National Institutes of Health.
A standard disclaimer should follow, such as:
The contents of this report [or web site] are solely the responsibility of the authors and do not necessarily represent the official views of the National Library of Medicine or NIH, DHHS.