Dargham Mahdi al-Zaidi, a pro-reform activist aged around 30, was released on 3 July. He was apparently told that he must stop taking part in anti-government protests.
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Khaled al-Qazzaz was released on 11 January after spending more than a year and a half in detention without charge or trial, much of it in secret detention.
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Medical doctors have described how, even after short periods of time, solitary can lead to insanity.