The Agency for Toxic Substances and Disease Registry (ATSDR), based in Atlanta, Georgia, is a federal public health agency of the U.S. Department of Health and Human Services.
The Case Studies in Environmental Medicine (CSEM) are a series of self-instructional publications designed to increase the primary care provider's knowledge of hazardous substances in the environment and to aid in the evaluation of potentially exposed patients.

ATSDR
Public health statement on Cobalt
Toxicological Profile;Cobalt
Fact sheet on Cobalt