Philip, 91, has been admitted to hospital three times in the past 18 months after suffering health scares.
Brown died on Christmas Day, aged 73, after being admitted to hospital with severe pneumonia.
The company said he died after being admitted to hospital, suffering from cancer, earlier this month.
Mr Mitra was eventually rescued by policemen and admitted to hospital where he is undergoing tests.
He has been admitted to hospital on three occasions in the past two years.
In the UK, about 5, 000 teenagers are admitted to hospital every year for alcohol-related reasons.
Nearly two thirds of patients admitted to hospital are over the age of 65.
The middle-aged woman, who had cancer, was admitted to hospital last year with a high fever.
Mr Mandela was last admitted to hospital in February when he was treated for abdominal pain.
The duchess had been admitted to hospital suffering from hyperemesis gravidarum, acute morning sickness.
Gloria Foster, 81, from Banstead, Surrey, was admitted to hospital nearly two weeks ago.
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Baby P was admitted to hospital in April 2007 for a large swelling to his head.
Mr Mandela has been admitted to hospital on three occasions in the past two years.
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Her brother said she was admitted to hospital three weeks ago with a cough and chest infection.
Recent studies have suggested that up to 40% of people are under-weight when they're admitted to hospital.
It is the fourth time Mr Mandela has been admitted to hospital in just over two years.
Mr Mandela was admitted to hospital just before midnight, the office of President Jacob Zuma said earlier.
Her husband was eventually admitted to hospital for treatment for his mental-health problems, the Global Times said.
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The BBC understands Mr Baker was admitted to hospital after being stabbed in St Leonards on 14 April.
Friends of Palmer say she has been admitted to hospital in recent weeks suffering from anxiety and depression.
After Mr Mandela was admitted to hospital late on Wednesday, President Jacob Zuma said people "must not panic".
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In 2006, of the 152 live births at 22 weeks, 19 were admitted to hospital and three survived.
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Twenty children with suspicious symptoms have been admitted to hospital in Kuala Lumpur and are being closely monitored.
News late last week that newly appointed Dynamo Kiev coach Oleg Blokhin had taken ill and admitted to hospital.
Ms Wright-Hogeland was eventually admitted to hospital where she spent 10 days receiving intensive treatment to cure the infection.
Less than a month later the younger boy was admitted to hospital with skull fractures and a subdural haemorrhage.
Mr Machin said many people admitted to hospital had illnesses other than that for which they were being treated.
He had been admitted to hospital on several occasions but discharged himself and refused to take his anti-psychotic medication.
There are worries about Dr Mahathir's health after he was admitted to hospital last week with a lung infection.
Of fewer than 100 people infected in Nunavut, the vast Arctic homeland of Inuits, 10 were admitted to hospital.
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