"call of concern" is a correct and usable phrase in written English.
You can use it to indicate a phone call or other communication from someone expressing concern about a situation. For example: "John received a call of concern from his parents about his recent behavior."
"Certainly we have had calls of concern, which fortunately we've been able to deal with.
But after the underwriting messages went on the air, the president of Duquesne, Charles J. Dougherty, received two calls of concern about the spots on Oct. 9, one from a member of his cabinet and another from a university supporter.
This person also said Mr. Rubin made the call out of concern that a rate cut might encourage reckless behavior on Wall Street.
Health services A, C & D specified that each record includes; date, time, name of caller, contact details, subject of call, description of concern, advice given and name of staff member.
Vice President Al Gore, adopting the Clinton policy, supports a more modest land-based system that could protect against a small number of missiles fired at the United States by mistake or by what the administration previously called rogue states but now calls "states of concern," like, perhaps, North Korea or Iraq.
The festival this year, called "Climate of Concern," is devoted to "themes of global warming".
In addition, governments in several developing countries, including Panama, Kenya and South Africa, have sought to limit the use of Internet calling out of concern that national carriers in those countries were losing revenue to Internet-based systems.
Asked whether he was now revealing the additional calls out of concern that they might be among those recorded by the authorities in the investigation that led to the downfall of Mr. Blagojevich, Mr. Burris said, "Absolutely not".
The current health care regulation ("ObamaCare" as it's "fondly" called) is of concern to many small business owners.
I knew they had called because it had sounded as if my mom was hurt but I fumed inside at their nosiness; it almost felt as if I had to protect my mom although they called out of concern.
