Dorothy Parker? Alexander Woollcott? Apocryphal?

Question for Quote Investigator: A patient in a modern hospital room can push a button to call for the help of a nurse; however, on occasion, the response time is long because nurses have many medical tasks to perform. The famous wit Dorothy Parker created a joke on this topic. She claimed that pushing the button enabled her to experience an extended interval of privacy. Would you please help me to find a citation?
Reply from Quote Investigator: The earliest match located by QI appeared in a 1933 article by prominent critic Alexander Woollcott in “Hearst’s International-Cosmopolitan” magazine. Woollcott described visiting Dorothy Parker who was being treated in a hospital. Emphasis added to excerpts by QI:1
Tiptoeing now down the hospital corridor, I found her hard at work. Because of posterity and her creditors, I was loath to intrude, but she, being entranced at any interruption, greeted me from her cot of pain, waved me to a chair, offered me a cigaret and rang a bell. I wondered if this could possibly be for drinks. “No,” she said sadly, “It is supposed to fetch the night nurse, so I ring it whenever I want an hour of uninterrupted privacy.”
Below are additional selected citations in chronological order.
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