The power of a first impression often begins with a smile. In the modern era where visual communication and social presence ...

James Chen, CMT is an expert trader, investment adviser, and global market strategist. David Kindness is a Certified Public Accountant (CPA) and an expert in the fields of financial accounting, ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Ryan Eichler holds a B.S.B.A with a ...

Abstract: Using sleep laboratory polysomnography (PSG) is restricted for the diagnosis of only the most severe sleep disorders due to its low availability and high cost. Home PSG is more affordable, ...

CPAP helps keep airways open and prevents breathing gaps during sleep. Using CPAP can improve asthma symptoms if you have sleep apnea and asthma. Sleep apnea worsens asthma by causing airway ...