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A man in a shirt wearing a Philips Respironics Actiwatch, a clinical research-grade tracker watch for insomnia, sleep studies and activity monitoring Stock Photo - Alamy
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PHILIPS Digital Alarm Clock Radio for Bedroom with FM Radio, LED Display, Easy Snooze, Sleep Timer, Battery Backup (Batteries not Included) - Walmart.com
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A Philips Respironics Actiwatch and a Fitbit Charge 2. Clinical vs commercial activity tracker watch for insomnia, sleep studies and monitoring Stock Photo - Alamy
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A man in a shirt wearing a Philips Respironics Actiwatch, a clinical research-grade tracker watch for insomnia, sleep studies and activity monitoring Stock Photo - Alamy
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