Very interesting paper! Still, lots of work to do, to quote "However, it was not possible to control other factors, such as the socio-economic environment of t

Very interesting paper! Still, lots of work to do, to quote "However, it was not possible to control other factors, such as the socio-economic environment of the participants.". In my view this could affect the study quite a lot (or not, but unknown for now). They mention the initial intervention was 3 months on-site, but after "the patient returned to his area of residence, where he/she would have speech therapy and special education".