Eligible patients were randomized into two groups: Vitamin D group and Control group. Control group: received placebo plus standard care, no additional vitamin D intervention therapy. Vitamin D group: In addition to the standard care, additional intramuscular injection of vitamin D2 was given once every two weeks, each dose of 600,000 units, and the treatment lasted for 12 weeks. The primary and secondary outcomes will be collected.
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Quality of life score
Timeframe: up to 12 weeks
Muscle function status
Timeframe: up to 12 weeks