Many wounded and injured are not seeking treatment at Salmaniya for fear of arrest.
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Tobin fled to London but was eventually arrested after seeking treatment at a hospital under a false name.
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The Xinhua news agency said there had been a sharp rise in people seeking treatment at the hospitals in the capital for respiratory problems.
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The BBC's M Ilyas Khan in Islamabad says that students and applicants seeking medical treatment have suffered the most as many of them have missed crucial appointments at colleges and hospitals.
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