They studied 200 patients with an average age of 60 and discovered that those on a low dose had double the reduction in knee pain of patients on higher doses.
In particular, women hoping to become pregnant are advised in many countries to take double the recommended dose of folic acid.
特别是想要小孩的女性。在很多国家，医生都建议她们摄入两倍于一般剂量的叶酸。
3
Current WHO estimates suggest that the vaccine storage requirements would at least double if only single-dose presentations were used (WHO vaccine volume calculator, March 2011).