Xiao Hiu-chun, seven, who suffers from the rare MPS Type IV A disease, with his mother, Liu Yongfang, in August. Photo: Dickson Lee

Pharma firm holds the key to costly trial therapy for Hong Kong boy with rare disease

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Xiao Hiu-chun, seven, who suffers from the rare MPS Type IV A disease, with his mother, Liu Yongfang, in August. Photo: Dickson Lee
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