Korean J Occup Environ Med. 1996 Dec;8(3):490-498. English. Original Article.
Occupational Health Program, Department of Environmental Health, Harvard School of Public Health, Boston, MA.
Channing Laboratory, Department of Medicine, Brigham and Womens Hospital, Harvard Medical School, Boston, MA.
The Normative Aging Study, Department of Veterans Affairs, Boston, MA.
No abstract available.