Innovation, redefined. The smartest microinverter on the market today â and tomorrow. Remarkable innovation keeps APsystems microinverters ahead of the competition, and puts more power and efficiency into your solar array. APsystems offers advanced solar technology where the world needs it most: everywhere.
For adults, the most common causes of chronic cough are asthma, gastroesophageal reflux disease (GERD), and upper airway cough syndrome (related to postnasal drip), according to background information in Marchant's study.
The most common cause of an acute or subacute cough is a viral respiratory tract infection. In adults with a chronic cough, i.e. a cough longer than 8 weeks, more than 90% of cases are due to post-nasal drip, asthma, eosinophilic bronchitis, and gastroesophageal reflux disease. psychogenic cough ( habit cough  or tic cough) may be the cause in the absence of a physical problem. In these instances, emotional and psychological problems are suspected. However, other illnesses have to be ruled out before a firm diagnosis of psychogenic cough is made.