i think the doctors first have to recrute people who want to do it. then they will have to make a date when they want to do it. then they need to wait for results.
i think it will take about 2 months that we know if it works or not. (1 month for recruting people and 1 month to wait for results.) but this is pure speculation.
maybe someone else can tell better how long we have to wait. i think the best is to wait now and dont speculate too much…this makes one crazy.