The CWS solution can transmit both peak expiratory flow (PEF) and forced expiratory volume in one second (FEV1). Many asthma specialists consider FEV1 the more reliable indicator of an impending ...
Claire Boyte-White is the lead writer for NapkinFinance.com, co-author of I Am Net Worthy, and an Investopedia contributor. Claire's expertise lies in corporate finance & accounting, mutual funds, ...
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