On 2015 Nov 18, Diana Petitti commented:

I recently reviewed publications about vitamin D and prevention of falls. The abstract of this publication states that the four treatment groups in this randomized trial were HRT alone, vitamin D alone, HRT plus vitamin D, and placebo, However, women assigned to the placebo group were prescribed 500 mg of calcium lactate. Thus, considering the trial assess the effect of HRT alone, vitamin D alone and HRT plus vitamin D compared with calcium alone.

On 2015 Nov 18, Diana Petitti commented:

I recently reviewed publications about vitamin D and prevention of falls. The abstract of this publication states that the four treatment groups in this randomized trial were HRT alone, vitamin D alone, HRT plus vitamin D, and placebo, However, women assigned to the placebo group were prescribed 500 mg of calcium lactate. Thus, considering the trial assess the effect of HRT alone, vitamin D alone and HRT plus vitamin D compared with calcium alone.