U.S. Department of Health and Human Services (HHS), U.S. Public Health Service (PHS), Centers for Disease Control and Prevention (CDC), National Institute for Occupational Safety and Health (NIOSH),
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1998 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.98EX184), Waltham, MA, USA. IEEE: pp. 85-88; ISBN 978-0-7803-4955-1