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4 ratio » 4 radio, 4 rating

1
by Lux, Linda J., Boehlecke, Brian A., Lohr, Kathleen N.
Published 2004
Agency for Healthcare Research and Quality
...Type 3 devices include a minimum of four channels and must monitor at least two channels...

2
by Lux, Linda J., Boehlecke, Brian A., Lohr, Kathleen N.
Published 2004
Agency for Healthcare Research and Quality
...Type 3 devices include a minimum of four channels and must monitor at least two channels...