Original sentence: Studies of both implementations of the therapeutic model have in general not yielded definitive evidence of efficacy when assessed in terms of long-term prevention of problem drinking as compared to other treatments, although limitations are widely acknowledged in obtaining acceptable data due to the impossibility of applying adequate controls to clinical analysis of AA
Edited sentence: Studies of both implementations of the therapy have in general not yielded definitive evidence of efficacy when assessed in terms of long-term prevention of problem drinking, although limitations are widely acknowledged in obtaining acceptable data due to the impossibility of applying adequate controls to clinical analysis of AA