NIRSNet - References
PubMed offers access to more than 11 million MEDLINE citations dating back to the mid-1960s, as well as a number of other life science journals.
Science Citation Index
The Science Citation Index contains anything else that you might need. (Access is via the Harvard University library - ID required).
The Optics InfoBase includes publications from the journals of the Optical Society of America.
IoP Electronic Journals
The Institute of Physics offers free online access to its articles for 30 days following publication.
OPTICAL SPECTRA - Oregon Medical Laser Center
The Oregon Medical Laser Center Web site contains some useful information - for example, the optical spectra of hemoglobin, water and ICG.
On-line Medical Dictionary
Yep. It's a medical dictionary. On-line.