List of causes of Ondine's curse. Following is a list of causes or underlying conditions (see also Misdiagnosis of underlying causes of Ondine's curse) that could possibly cause Ondine's curse includes: Persons who have CCHS get it at birth, or develop it due to severe neurological trauma/damage to the brainstem.
In real life, Della (Barbara Hale) was married and Perry (Raymond Burr) was gay. So, no, they were not an item on the show or behind the scenes.
Days Inventory Outstanding (DIO), also known as Days Sales of Inventory (DSI), is an efficiency metric used to measure the average number of days a company holds inventory before selling it. This ratio is industry specific and should be used to compare competitors and over time.