The person was hired by an agency on a short-term contract, the hospital said.
Kabba, 28, has joined on a short-term contract from League One side Brentford until 23 December.
Now Dublin, who joined the club on a short-term contract in January, could be brought back to Celtic Park.
BBC: SPORT | Football | My Club | Celtic | Strachan reveals Dublin may sign
Cotterill joined County on a short-term contract in February and in April his side clinched promotion to League One.
Meanwhile, Duke has landed a short-term contract job lobbying for an environmental group.
The 29-year-old is yet to start a match for the U's since agreeing a short-term contract over the summer.
The second is that a short-term contract does not mean short-term profits.
He made four Championship appearances for Essex in 2003 after agreeing a short-term contract and picked up 20 wickets, including figures of 8-49 against Surrey.
The former Austria Under-21 international had recently been on trial at the Banks's Stadium, and has agreed a short-term contract subject to receiving international clearance.
The 31-year-old left-hander, who has joined Lancashire on a short-term contract, was in fine form in 2008, scoring 900 runs at an average of 64.28.
Gannon is currently on a short-term contract at London Road.
The 29-year-old, who arrived at the region in February on a short-term contract, has made five Ospreys appearances and will continue to be available for selection for the remaining four Magners League games this season.
Meanwhile, trialist Claus Jorgensen has refused a deal at Vale Park after manager Micky Adams offered the former Blackpool midfielder a short-term contract, and striker Steve Thompson has joined Blue Square North side Stafford Rangers on loan.
The Englishman, who won the Champions League with Manchester United in 1999, also won league titles with Real Madrid, AC Milan and Los Angeles Galaxy before arriving in the French capital earlier this year after signing a short-term contract.
Even after the reforms of teachers' pensions take effect in September, this will still be the case for retirements on health grounds, though teachers will no longer be able to accept an ill-health pension one day and be back teaching on a short-term contract the next.
The International Capital Market Association, a trade group for securities-market participants, estimated in a report last month that the tax would cause the short-term repo market to contract by 66%.
The dual-code international, 30, who joined Leicester on a short-term deal in November, had been tipped to return to Australia when the contract ended.
The International Capital Market Association, a lobby group, has warned that the tax would cause the short-term repo market in Europe to contract by at least two-thirds, with serious consequences for other financial markets and the real economy.
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