Former president Chen Shui-bian (陳水扁) collapsed for the fourth time since being incarcerated, prompting concerns over his deteriorating health, Chen’s all-volunteer medical group said yesterday

Kuo Cheng-deng (郭正典), one of the doctors in the group, said Chen had been about to answer a call of nature at about 7:30pm when — as happened in the previous incidents — he lost his balance and fell onto a sofa close to his bed, hitting his head on a cell wall in the process.