One month is not enough to check whether this works. Furthermore it's important to check for the Hawthorn Effect. https://en.wikipedia.org/wiki/Hawthorne_effec

One month is not enough to check whether this works. Furthermore it's important to check for the Hawthorn Effect. https://en.wikipedia.org/wiki/Hawthorne_effect https://en.wikipedia.org/wiki/Hawthorne_effect