According to the American Sleep Apnea Association, about 22 million Americans suffer from sleep apnea. An estimated 80% of cases go undiagnosed and untreated, which can lead to major health problems ...

A Philips Respironics System One unit, used to treat sleep apnea, in 2015. (Jasper Juinen/Bloomberg News) The stock rose some 29% in Amsterdam, its largest increase on record. The data goes back to ...